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Role of hygroscopic chloride salts on corrosion performance and hydrogen absorption of steel under cyclic wet-dry conditions Corros. Sci. (IF 8.3) Pub Date : 2024-03-15 Xiaole Han, Masatoshi Sakairi
The corrosion morphology of steel under aqueous NaCl, MgCl, and ZnCl droplets and the corresponding hydrogen permeation behaviour were investigated using surface characterization techniques and electrochemical methods. Under cyclic wet-dry conditions, Mg and Zn-containing surface layers were formed on steel and the latter presented a high corrosion resistance. The most active hydrogen entry occurred
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Towards Understanding Stress Corrosion Cracking of Austenitic Stainless Steels Exposed to Realistic Sea Salt Brines Corros. Sci. (IF 8.3) Pub Date : 2024-03-15 R.M. Katona, J. Taylor, T. McCready, C.R. Bryan, R.F. Schaller
Stress corrosion cracking behavior of stainless steel 304L was investigated in full immersion, evaporated artificial sea salt brines (ASW) at 55 °C. It was observed that brines representative of thermodynamically stable brines at lower relative humidity (40% RH, MgCl-dominant) had a faster crack growth rate than high relative humidity brines (76% RH, NaCl-dominant). Observed crack growth rates () under
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Corrosion Mechanism of Cold Forged 316 Stainless Steel in Molten FLiNaK Salt Corros. Sci. (IF 8.3) Pub Date : 2024-03-14 Minsung Hong, Shmuel Samuha, Peter Hosemann
This study examined how cold forging (CF) affects the corrosion of 316 stainless steel (SS) in molten FLiNaK salt at 700°C for 48hours. CF samples had two corrosion areas: one near the top and another displaying intergranular corrosion (IGC). Samples with lower CF (5-30%) showed more IGC, while the 50% CF sample had less IGC but the shallowest corrosion depth. This was due to the increased number of
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Insight into the corrosion behaviors and mechanism of the self-healing Si/N-DLC films in oilfield environment Corros. Sci. (IF 8.3) Pub Date : 2024-03-14 Xubing Wei, Haiyan Feng, Zhengyu Liu, Zan Chen, Pingmei Yin, Shiqi Lu, Jiaqing Ding, Naizhou Du, Xiaowei Li, Guangan Zhang
The Si/N-DLC films with different Si and N contents were deposited and the corrosion behaviors in the simulated CO-saturated oilfield produced water was mainly investigated. Results reveal that Si/N-DLC films improves dramatically the corrosion resistance of the substrate. This attributes to not only the channel blockage caused by diffusion of corrosion products, being composed of silicon oxide (SiO)
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Effect of Mo on intergranular corrosion behavior in super-austenitic stainless steel Corros. Sci. (IF 8.3) Pub Date : 2024-03-13 Hua-yun Du, Qun-kun Hu, Xi-wen Yue, Jian-wen Jia, Ying-hui Wei, Li-feng Hou, Hong Luo, Qian Wang, Hong-wei He, Huan Wei, Xiao-da Liu
The effect of the Mo element on the intergranular corrosion behavior was investigated on super-austenitic stainless steels. The σ-phase structure and compositional changes of stainless steels with different Mo contents during aging at 800–900°C were investigated by TEM, combined with electrochemical tests, and two different intergranular corrosion mechanisms were revealed. The low-Mo 904 L stainless
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Influence of Severe Surface Plastic Deformation Induced by Shot Peening on Microstructure and Corrosion Resistance of fine grained 316 L stainless steel Corros. Sci. (IF 8.3) Pub Date : 2024-03-12 P. Ebrahimzadeh, L.B. Peral, R. González-Martínez, E. Mardaras, I. Fernández-Pariente
The influence of a severe shot peening (SSP) treatment in corrosion resistance of AISI 316L austenitic stainless steel was studied by different electrochemical measurements in 3.5% NaCl solution. SSP promoted the formation of ultrafine grains in the upper layer. The formation of strain induced martensite appears to be facilitated by twinning due to the induced severe plastic deformation. SSP treatment
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Key role of gradient-nanostructure and extremely thin amorphous passive film on tribocorrosion behavior of a novel Cr+N alloyed high-Mn austenitic steel Corros. Sci. (IF 8.3) Pub Date : 2024-03-12 Shuchao Shen, Chen Chen, Xiangyang Qi, Bo Lv, Yuefeng Wang, Zhinan Yang, Fucheng Zhang
High manganese steel is influenced by the combined effects of corrosion and wear during service under specific conditions, resulting in components with shortened service life. Under harsh service environments, newly developed Cr+N alloyed austenitic high manganese steel (Mn18Cr7C0.6N0.2 steel) as a new type of railway steel has shown promising results. Herein, the tribocorrosion behaviors of Mn18Cr7C0
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The investigation of Bacillus cereus induced degradation of passive films of 5A06 aluminium alloy in simulated condensate solutions of space station Corros. Sci. (IF 8.3) Pub Date : 2024-03-11 Yali Feng, Junhang Chen, Qianqian Liu, Nana Chen, Shiwen Zou, Qiong Yao, Lin Lu, Kui Xiao
Microbiologically influenced corrosion in water recovery system of manned spacecrafts deserves attention. The effect of on the corrosion of 5A06 aluminium alloy in simulated condensate solutions of space station was investigated. The organic acids induced significant dissolution of aluminium alloy, electrochemical measurements results showed living cells could weakened the cathode reaction, and focused
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Effect of fretting regimes on the fretting corrosion behavior of stainless steel in artificial crevices Corros. Sci. (IF 8.3) Pub Date : 2024-03-11 Heng Liu, Jiachen Chen, Xiangdong Tian, Zening Wang, Yi Zhang, Yu Yan
Fretting crevice corrosion at the fastening interfaces of stainless-steel products is an unavoidable issue in the medical, marine, and nuclear industries. In this study, the effects of the fretting regimes on the fretting corrosion in artificial crevices were investigated, and the results showed that fretting initiated severe corrosion inside the crevice under the stick regime. Under the stick–slip
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Function of Cu-Sb or Al microalloying on the corrosion resistance of 9Cr steel exposed to simulated concrete pore solution Corros. Sci. (IF 8.3) Pub Date : 2024-03-10 Zhaodong Li, Runnong Chen, Yanguang Cao, Bo Gao, Qilong Yong, Qifu Zhang, Xiaogang Li
The role of Cu-Sb or Al on the passivation and Cl-induced depassivation of 9Cr steel in simulated concrete pore solution was systematically obtained via electrochemical tests and microstructure characterization. Both microalloying enhanced electrochemical passivation even if the solution pH dropped. Cu and Al participated in the formation of natural passive film, and the properties of passive film
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Advanced cavitation erosion-corrosion resistance of nickel-aluminum bronze prepared by directed energy deposition Corros. Sci. (IF 8.3) Pub Date : 2024-03-08 Cheng Xu, Yong Peng, Liang-Yu Chen, Tian-Yang Zhang, Jing-Jing Cheng, Ke-Hong Wang
The mechanical properties and cavitation erosion-corrosion behavior of directed energy deposition (DED) and as-cast nickel-aluminum bronze (NAB) alloys in 3.5 wt% NaCl solution were investigated. The DED-produced NAB alloy showed a finer microstructure, and the content of κ phases significantly decreased, improving yield strength (increased by 27.76%) and elongation (increased by 54.89%) of NAB alloy
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High-temperature steam oxidation experiment of molten zirconium alloy Corros. Sci. (IF 8.3) Pub Date : 2024-03-08 Haoli Wang, Simin Luo, Xinhai Zhao, Yapei Zhang, Yicong Lan, Xiaocheng Wu, Dong Wang, Wenxi Tian, Suizheng Qiu, G.H. Su
In this study, we investigate the steam oxidation behaviors of molten zirconium alloy at exceptionally high temperatures of 1870 ℃ and 1970 ℃. A specialized high-temperature steam oxidation apparatus was established to conduct the steam oxidation experiment. The experiments yielded crucial data including oxidation weight gain results, macroscopic appearance of the oxide surface, and section morphology
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Riboflavin-mediated Fe0-to-microbe electron transfer corrosion of EH40 steel by Halomonas titanicae Corros. Sci. (IF 8.3) Pub Date : 2024-03-08 Shihang Lu, Lingqun Zhang, Nianting Xue, Shiqiang Chen, Muqiu Xia, Mengyu Fu, Yuanyuan Gao, Wenwen Dou
This study investigated riboflavin (RF)-mediated Fe-to-microbe electron transfer corrosion of EH40 steel caused by . The addition of 20 ppm RF to the biotic medium increased the weight loss and maximum pitting depth of EH40 steel by 67 % and 64 %, respectively. After 20 ppm RF injection into a 3-d broth, the biotic corrosion started to increase within minutes, reflecting that the extracellular electron
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Exploring mechanism of corrosion inhibition of WE43 and AZ31 alloys by aqueous molybdate in Hank’s solution by multisine impedimetric monitoring Corros. Sci. (IF 8.3) Pub Date : 2024-03-07 Maria A. Osipenko, Jakub Karczewski, Michał Dominów, Marta Prześniak-Welenc, Jacek Gurgul, Iryna I. Kurilo, Jacek Ryl, Dzmitry S. Kharytonau
The concept of utilizing multisine dynamic electrochemical impedance spectroscopy to monitor effectiveness of a model molybdate inhibitor for AZ31 and WE43 Mg alloys is proposed. The corrosion kinetics and instantaneous values of inhibition efficiency () of molybdate at concentrations up to 150 mM were examined. The inhibitor provides inhibition in Hank’s solution at concentrations starting from ca
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Stress corrosion cracking behavior and mechanism of 2205 duplex stainless steel under applied polarization potentials Corros. Sci. (IF 8.3) Pub Date : 2024-03-07 Yue Pan, Baozhuang Sun, Hetian Chen, Zhiyong Liu, Wenhe Dai, Xiaojia Yang, Weiting Yang, Yida Deng, Xiaogang Li
In this work, a non-steady electrochemical model for assessing stress corrosion cracking (SCC) of 2205 duplex stainless steel (DSS) under applied polarization potentials was proposed, and the SCC mechanism was revealed. With the negative shift of potentials, hydrogen enhances SCC susceptibility by deteriorating passive film, inhibiting repassivation and causing serious damage. In particular, at −850 mV
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Effect of δ–ferrite and strain-induced martensite on hydrogen embrittlement of STS 308 L and STS 316 L all-weld metals Corros. Sci. (IF 8.3) Pub Date : 2024-03-07 Donghyeon Choi, Jimin Nam, Byungrok Moon, Sourav Kr. Saha, Jaeseok Yoo, Jong Min Park, Kwang Hee Yun, Namhyun Kang
The susceptibility of multipass flux-cored arc welds of STSs 308L and 316L to hydrogen embrittlement (HE) was investigated at various temperatures. Cracks predominantly initiated and propagated along the δ-ferrite in the interdendritic region at 25 °C. δ–ferrite served as preferred hydrogen trap sites, and the δ/γ boundary became the stress concentration site. At -100 °C, STSs 308L and 316L exhibited
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Towards a better understanding of hydrogen-assisted cracking in multiphase stainless steel Corros. Sci. (IF 8.3) Pub Date : 2024-03-06 Menghao Liu, Cuiwei Du, Xiaogang Li
Given the high strength of multiphase stainless steel, it is imperative to study its hydrogen embrittlement behavior. However, the understanding of hydrogen-assisted crack initiation and propagation is limited. In this study, we investigate the hydrogen-assisted cracking behavior of multiphase stainless steel through crack analysis, hydrogen permeation test, and hydrogen desorption experiments. Our
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High-resolution characterization reveals the role of Al content in the evolution of oxide scales formed on alumina-forming alloy exposed to supercritical water Corros. Sci. (IF 8.3) Pub Date : 2024-03-05 Yang Gao, Ranrran Su, Zhu Liu, Kai Chen, Shuo Cong, Lefu Zhang, Xianglong Guo
The oxidation behavior of alumina-forming austenitic (AFA) stainless steels exposed to 600 °C supercritical water (SCW) was studied via several high-resolution characterization techniques. The addition of 1.5 - 3.5wt.% aluminum (Al) significantly affected the microstructure of AFA alloys compared with Al-free alloys, with the formation and re-distribution of precipitates, including Laves, B2-NiAl,
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Understanding the high-temperature oxidation resistance of heat-resistant austenitic stainless steel with gradient nanostructure Corros. Sci. (IF 8.3) Pub Date : 2024-03-05 L.L. Wei, Y.G. Wang, R.D.K. Misra, J. Chen
The underlying high-temperature oxidation mechanisms of the heat-resistant austenitic stainless steel with gradient nanostructured surface layer is revealed through systematic analysis of the microstructure and composition. Nanoscale oxide grains and high-density grain boundaries promoted the formation of pronounced spinel oxides, which suppressed elemental diffusion and CrO volatilization. High level
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Molecular mechanism of the sulfide corrosion of α-iron Corros. Sci. (IF 8.3) Pub Date : 2024-03-05 J.B. Murowchick, A. Oldroyd, D. Rickard
The reaction between aqueous sulfide and α-iron at ambient temperatures produces a ferrous monosulfide with a tetragonal mackinawite structure, FeS. The reaction is epitactic with the Fe structure in FeS being similar, but not identical, to the Fe structure in α-iron. The strain induced by these small structural differences results in spallation of the FeS product. This causes the exposure of new α-iron
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Detrimental effect of high-productivity L-PBF parameters on metal dusting resistance of Inconel 625 Corros. Sci. (IF 8.3) Pub Date : 2024-03-04 A Vernouillet, A. Vande Put, A. Pugliara, E. Epifano, T. De Terris, P. Peyre, S. Doublet, D. Monceau
The effect of increased productivity in L-PBF manufacturing on the metal dusting resistance of Inconel 625 was studied at 610 °C. Two sets of processing parameters were tested: the standard parameters given by the machine manufacturer and degraded parameters with increased scan speed and hatching distance. The materials obtained with degraded parameters presented numerous lacks of fusion at the surface
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Effect of silicon on the kinetics and mechanisms of cyclic oxidation of titanium aluminide (Ti45Al5Nb0.5Si) developed by laser direct energy deposition Corros. Sci. (IF 8.3) Pub Date : 2024-03-04 Anupama Dutta, Andreas Weisheit, Jyotsna Dutta Majumdar
In this study, titanium aluminides comprising of Ti45Al5Nb0.5Si (TiAl-1), Ti45Al5Nb5Si (TiAl-2) and Ti45Al5Nb10Si (TiAl-3) were developed through laser direct energy deposition (LDED) with Nd-YAG laser under optimized process parameters. The microstructure of TiAl-1 consists of α+γ phase mixtures. Addition of 5wt.% and 10wt.% Si results in the formation of silicides in addition to γ and α phases. A
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Effect of carbon addition on the microstructure and corrosion resistance of the CoCrFeNi high-entropy alloy Corros. Sci. (IF 8.3) Pub Date : 2024-03-03 Xueming Wei, Lijun Zhang, Fengyi Zhang, Chunzhi Zhang, Qixiang Jia, Kai Sun, Dongtao Duan, Hui Jiang, Gong Li
Interstitial atom doping can enhance mechanical properties and phase structure, but its impact on corrosion resistance is not well-researched. This study investigated the influence of carbon-doping on the microstructure and corrosion resistance of CoCrFeNi high-entropy alloys. The results show that alloy doped with a moderate carbon content (C0.3 alloy) have the best corrosion resistance in 3.5 wt%
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Effect of water vapor content on the corrosion mechanism of HR3C in simulated oxy-coal combustion environment Corros. Sci. (IF 8.3) Pub Date : 2024-03-03 Zheng Yu, Shasha Yang, Leipeng Xie, Minghui Chen, Fuhui Wang
The corrosion performance of the HR3C steels covered with salt deposition (NaSO:KSO = 1:1) was investigated under various water vapor content at 700 °C. Results show that the HR3C alloy undergoes severe pitting and sulfidation in a dry corrosive atmosphere (0.5SO-4O-CO) and the corrosion products are peculiarly prone to peel off. In comparison, the corrosion behavior is gradually mitigated with increasing
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On the critical pit stability product of stainless steel as a function of pit depth Corros. Sci. (IF 8.3) Pub Date : 2024-03-02 Ke Wang, Tianshu Li, Gerald S. Frankel, Mariano Iannuzzi
A stepwise galvanostatic method was developed to identify the critical pit stability product, (), of 316 L stainless steel (SS) as a function of pit depth in 0.6 M NaCl at 25°C. () for a flat-bottom pit was 80–90% of the () value for salt film formation, (), independent of pit depth. However, the () threshold at which the pit propagated with a heterogeneous dissolution interface, (), decreased with
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Enhancing corrosion resistance and mechanical properties of laser-direct energy deposited 316 stainless steel via W addition Corros. Sci. (IF 8.3) Pub Date : 2024-03-02 Tao Lai, Pengfei Sun, Huaiyuan Sun, Wenji Song, Congwen Tang, Heng Zhang, Ming Chen, Dengzhi Wang
Additions of 1–5 wt% W element enhanced corrosion resistance and mechanical properties of LDED-316 SS. Microstructure characterized the grain refinement and precipitation of ferrite and W-Mo carbides. Mechanical tests showed enhanced tensile strength and hardness of 316–5 W by 37.4% and 30.8%, respectively. Electrochemical tests indicated an increasing pitting potential and polarization resistance
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High-temperature oxidation resistance of SiCf/SiC composites annealed and cladded with LaMgAl11O19/Yb2Si2O7 thermal/environmental barrier coatings Corros. Sci. (IF 8.3) Pub Date : 2024-03-02 Kaiyue Lü, Yan Huang, Kuangyi Zhao, Tingyang Chen, Tengfei Deng, Chunxi Luo, Longhui Deng, Shujuan Dong, Jianing Jiang, Xueqiang Cao
SiC/SiC composites were annealed at 1300 °C for 5 h in argon and then fully cladded by LaMgAlO/YbSiO (LMA/YbDS) thermal/environmental barrier coatings (T/EBCs). The annealed and coated system, directly-coated one and non-coated composites were isothermally oxidized at 1350 °C for 300 h. The oxidation resistance was estimated by strength retention rates. Compared to serious strength degradation in the
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The formation of pitting under dynamic DC interference: Corrosion product film defects or passive film induction Corros. Sci. (IF 8.3) Pub Date : 2024-03-02 Xin Yu, Jianguo Liu, Hailei Jiang, Gan Cui, Xiaoming Luo
The cause of pitting under dynamic DC interference is unclear. This paper studies the mechanisms of pitting in simulated solutions under neutral and alkaline conditions using weight loss, electrochemical testing, and microscopic characterization. The results indicate that the metal mainly undergoes active corrosion in the neutral solution, and the formation of millimeter-scale pits is due to local
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Hydrogen uptake kinetics of cathodic polarized metals in aqueous electrolytes Corros. Sci. (IF 8.3) Pub Date : 2024-03-02 Livia Cupertino-Malheiros, Malo Duportal, Tim Hageman, Alfredo Zafra, Emilio Martínez-Pañeda
We use a unique combination of electrochemical techniques to elucidate the dependency of hydrogen evolution reaction (HER) and absorption on pH and overpotential for iron and nickel. Impedance spectroscopy shows the dominance of the Volmer–Heyrovsky reaction pathway, challenging the common consideration of Volmer–Tafel dominance. Polarization slopes agree with the Volmer or Heyrovsky rate-determining
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Effect of coexistence of sulfate reducing bacteria and nitrate reducing bacteria on the under-deposit corrosion of carbon steel Corros. Sci. (IF 8.3) Pub Date : 2024-03-02 M.Q. Sun, J. Yang, Z.B. Wang, Y.G. Zheng
The effect of sulfate reducing bacteria (SRB) and nitrate reducing bacteria (NRB) on under-deposit corrosion (UDC) of carbon steel is studied by weight loss tests, electrochemical measurements and surface analysis. The results show that SRB-induced UDC is significantly inhibited by NRB. This inhibition is attributed to the accumulation of NRB in deposits suppressing the growth of SRB, as revealed by
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Effect of building orientation on the in vitro corrosion of biomedical Zn-Cu alloys prepared by selective laser melting Corros. Sci. (IF 8.3) Pub Date : 2024-03-02 Kaiyang Li, Yunlong Zhai, Jiangqi Zhu, Xinyu Hu, Chao Su, Yanqiang Kong, Chao Pan, Dayong Pang, Xingchen Yan, Naiqiang Zhang
Zn-Cu alloys as biodegradable materials have been successfully fabricated by selective laser melting (SLM) method. XRD, EBSD, electrochemical and immersion tests have been conducted to investigate the effect of building direction on microstructure and degradation behaviors. Finer grains and more CuZn precipitates are found on vertically built Zn-Cu alloy, which results in a higher degradation rate
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Iterative multi-objective design of hydrogen embrittlement resistant high-strength steels using Bayesian optimization Corros. Sci. (IF 8.3) Pub Date : 2024-03-02 Xujie Gong, Ruize Sun, Ruichao Lei, Xue Jiang, Yanjing Su, Yu Yan
The infiltration of hydrogen can weaken the strength and toughness of materials, especially in high-strength steel. Considering the inherent trade-off between strength and toughness in steel design, balancing these two factors with the material's hydrogen embrittlement sensitivity has become a huge challenge in steel design. The long cycle nature of hydrogen embrittlement testing makes the iteration
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Time-dependent high-pressure CO2-induced corrosion and mechanical degradation in lightweight fly-ash cement/P110 steel system Corros. Sci. (IF 8.3) Pub Date : 2024-03-01 Shuliang Wang, Shidong Wang, Zidan Wen, Mengjun Yao, Mingyu Wu
This study innovatively investigated CO-induced corrosion and mechanical degradation in lightweight fly-ash cement/P110 casing steel system under normal and high pressures. Key findings revealed time-dependent corrosion and mechanical evolution. Under normal pressure, cement properties peaked at 28 days, contrasting with 21 days under high pressure. Simultaneously, the corrosion rate of steel steadily
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Extremely improved the corrosion resistance and anti-wear behavior of aluminum alloy in 3.5% NaCl solution via amorphous CrAlN coating protection Corros. Sci. (IF 8.3) Pub Date : 2024-02-28 Xing Xu, Wenfang Li, Bingbing Wan, Shuoxun Jin, Ken Chen, Fenghua Su
The low hardness and limited anti-wear of aluminum alloys pose obstacles to their stability and service life, especially in corrosive environments. Here, the amorphous CrAlN coating was first deposited on aluminum alloy by DC magnetron sputtering. The CrAlN coating with 30.2% nitrogen content was dense and prevented the intrusion of oxidation and corrosive fluids, thus greatly improving the anti-corrosion
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Water vapor oxidation behavior and mechanism of high-entropy (TiZrNbTaCr)C at 1200°C Corros. Sci. (IF 8.3) Pub Date : 2024-02-27 Wentao Su, Lei Chen, Sijia Huo, Wen Zhang, Yujin Wang, Yu Zhou
High-entropy (TiZrNbTaCr)C ceramics with different Cr content were oxidized at 1200°C in water vapor. Zr(Nb, Ta)O, (Nb, Ta)O and (Ti, Nb, Ta, Cr)O were initial oxidation products. After a 4-h oxidation, TiO-(Nb, Ta)O was produced and changed from Ti(Nb, Ta)O to Ti(Nb, Ta)O with increasing Cr content, resulting in better oxidation resistance. TiO-(Nb, Ta)O with large size and relatively dense microstructure
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Unlocking the effect of interfacial microstructure and Desulfovibrio vulgaris on corrosion characteristics in copper-nickel alloy welded joint Corros. Sci. (IF 8.3) Pub Date : 2024-02-27 Yanan Pu, Shougang Chen, Yue Hou, Su Hou, Fan Feng, Zihao Guo, Congrui Zhu, Y. Frank Cheng
The microbiologically influenced corrosion (MIC) behavior of the copper-nickel (Cu-Ni) alloy welded joint induced by was investigated. Distinct gradient changes in MIC behavior were observed in different regions, with the heat-affected zone (HAZ) consistently exhibiting higher localized corrosion sensitivity. Specifically, the asymmetric corrosion of HAZ was attributed to the galvanic effect between
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Effect of surface hemispherical dent depth on the microstructure evolution and stress corrosion cracking of heat transfer tubes in steam generator Corros. Sci. (IF 8.3) Pub Date : 2024-02-25 Yun Ding, Sui Yuan, Renquan Wu, Shichen Wei, Shuo Wang, Jian Xu, Hongying Yu, Dongbai Sun
The deformation mechanism and SCC behavior of alloy 690TT with dents are investigated. Dents lead to stress concentration and microstructure changes, increasing stress corrosion cracking (SCC) sensitivity. The deformation mechanism at dents is slip and twinning. The dent shoulder zone experiences oxidation due to the residual tensile stress, whereas the dent bottom zone induces SCC due to the stress
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Unique corrosion behavior of an archaeological Roman iron ring: Microchemical characterization and thermodynamic considerations Corros. Sci. (IF 8.3) Pub Date : 2024-02-24 Valentina Valbi, Fabio Enrico Furcas, Delphine Neff, Philippe Dillmann, Ueli Angst, Myriam Krieg, Anika Duvauchelle, Marion Berranger, Stefano Mischler, Laura Brambilla, Naima Gutknecht, Christian Degrigny
The corrosion mechanisms of a Roman iron bezel ring were investigated by in-depth characterization of its uncommon corrosion pattern and thermodynamic modelling. A silver foil and altered glass remnants were identified, covered with thick strata of magnetite and goethite. Underneath it, was a multi-millimetric cavity, filled with spheroidal magnetite or magnetite/goethite nodules in a siderite matrix
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Enhanced localized corrosion resistance of Ni-based alloy 625 processed by directed energy deposition additive manufacturing Corros. Sci. (IF 8.3) Pub Date : 2024-02-24 Karthikeyan Hariharan, Andrew D. Iams, James S. Zuback, Todd A. Palmer, Narasi Sridhar, Rashed M. Alazemi, Gerald S. Frankel, Eric J. Schindelholz
We report a significant improvement in localized corrosion resistance of Ni-based alloy 625 processed by directed energy deposition (DED) in 7.6 mol/L LiCl at 50 °C. Disparities observed in polarization behavior between DED and wrought alloy 625 are analyzed through compositional and microstructural differences. The exceptional localized corrosion resistance of the DED alloy likely stems from the refinement
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Ablation behavior of ZrC-SiHfOC-MoSi2 coating for carbon/carbon composites under Ar-O2 plasma flame Corros. Sci. (IF 8.3) Pub Date : 2024-02-24 Xuemeng Zhang, Yuyu Zhang, Kaifei Fan, Ralf Riedel, Hongbin Li, Jia Sun, Hejun Li
To improve ablation resistance of ZrC-SiMOC-based (M = transition metal) coatings, a ZrC-SiHfOC-MoSi coating was investigated. The results showed that the MoSi shell limits the decomposition of SiC under SAPS and decreases pores of the coating. ZrC-SiHfOC coating showed large-area peeling after an Ar-O plasma flame ablation for 90 s. In contrast, ZrC-SiHfOC-MoSi coating revealed low ablation rates
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Evading the intermediate-temperature embrittlement of L12-strengthened high entropy alloys by alleviating intergranular oxidation Corros. Sci. (IF 8.3) Pub Date : 2024-02-24 Shaofei Liu, Jinxiong Hou, Yilu Zhao, Bo Xiao, Jiang Ju, Yinghao Zhou, Qian Li, Wuxin Zhao, Heyi Wang, Junhua Luan, Ji-jung Kai, Tao Yang
L1-strengthened high entropy alloys (HEAs) usually suffer from severe intermediate-temperature embrittlement. In this study, we revealed that the intermediate-temperature embrittlement of a (NiCoFeCr)NbAl L1-strengthened HEA originates from the severe oxidation of intergranular D0 precipitates which weakens the grain-boundary cohesion. With the minor addition of 1.5 at% Si, we successfully achieved
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Mechanism of coupling corrosion caused by flue gas and deposits in municipal solid waste incinerator: Roles of H2O(g), HCl, and SO2 Corros. Sci. (IF 8.3) Pub Date : 2024-02-23 Haiyan Li, Huan Liu, Yining Huang, Xiang Chen, Xiuju Zhang, Jianquan Li, Lejin Xu, Hong Yao
The key corrosive media and coupling corrosion mechanism in waste incinerators were investigated. The presence of HO(g) and the fluctuation of HCl/SO concentration significantly affect corrosion by affecting chemical reactions rather than molten phase formation·HO(g) had higher adsorption energy (−40.67 kJ/mol) on NaCl (100) surface than O (−7.95 kJ/mol), generating more HCl than Cl and inhibiting
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Unveiling the effect of magnetite on the synergistic action of deposits and microorganisms on carbon steel corrosion Corros. Sci. (IF 8.3) Pub Date : 2024-02-23 Maria A. Diaz-Mateus, Laura L. Machuca, Hanan Farhat, Silvia J. Salgar-Chaparro
The synergistic corrosion effect of microorganisms and deposits on carbon steel corrosion was assessed with magnetite and sand. In the presence of the microbial consortium with magnetite, uniform corrosion rates were 3.5 times higher (0.611 mm/year) than the sum of the corrosion rates promoted by the consortium and deposit separately (0.056 and 0.110 mm/year, respectively). Conversely, with sand, uniform
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Understanding the corrosion protection effect by surface oxide film to underlying Sn solder substrate under thermal exposure condition Corros. Sci. (IF 8.3) Pub Date : 2024-02-23 Chuang Qiao, Youzhi Wang, Jinli Jiang, Qiong Wu, Long Hao, Haitao Fu, Xizhong An
Oxide film formed on Sn-based lead-free solder surface plays an important role in protecting the solder joints in electronic devices. However, corrosion resistance of oxide film varied significantly under the effect of waste heat generated by electronic devices. In this work, the physicochemical properties of oxide film on pure Sn and SnAg solders were disclosed through analysing the corresponding
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Size-dependent thermal oxidation kinetics in Sm2(Co, Fe, Cu, Zr)17 alloy powder Corros. Sci. (IF 8.3) Pub Date : 2024-02-23 Ravi Teja Mittireddi, Akshant Kumawat, Ranjan Kumar Singh, Emila Panda
This study investigates the interrelationship between the oxide growth kinetics and the microstructural changes induced by dry, thermal oxidation in Sm(Co, Fe, Cu, Zr) alloy powder (of varying particle sizes and compositions). Whereas, model-free iso-conversional methods are used to determine the kinetic-triplets during the non-isothermal oxidation stage, power-law dependent kinetic model is considered
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High-temperature corrosion of a Si3N4/W composite exposed to molten MgCl2-NaCl-KCl salts Corros. Sci. (IF 8.3) Pub Date : 2024-02-23 Yueqi Wu, Mingyong Jia, Zhifeng Huang, Qiang Shen, Fei Chen
The high-temperature corrosion behavior of a SiN/W composite under the molten MgCl-NaCl-KCl salts has been investigated. It is suggested that the molten salts diffuse along the physical surface defects and enter the interior of adjacent SiN/W grains, leading to the 9.1% bending strength loss after 400 hours for corrosion. In air atmosphere, oxidation products WO, WO, and corrosion product MgWO caused
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Precipitation of metallic Ni clusters in alumina scale during high-temperature oxidation of NiAl in water vapor Corros. Sci. (IF 8.3) Pub Date : 2024-02-22 Dingding Zhu, Jianmin Chen, Jingzhao Chen, Xuedong Zhang, Haiming Sun, Xinli Wang, Shadie Zuo, Peng Jia, Canying Cai, Jianyu Huang, Guangwen Zhou
Water vapor is ubiquitously present for energy conversion and combustion systems but its effect on the oxidation of the critically important structure components of heat-resistant alloys remains elusive. Departure from the well-established phenomenon of the exclusive alumina growth from the NiAl oxidation in dry O, we demonstrate that the NiAl oxidation in HO results in the precipitation of a large
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Anomalous oxidation rate-temperature dependence of alumina-forming austenitic stainless steels exposed to 500–600 °C supercritical water Corros. Sci. (IF 8.3) Pub Date : 2024-02-22 Yang Gao, DaYun Sun, Zhu Liu, Shuo Cong, Rui Tang, Yanping Huang, Lefu Zhang, Xianglong Guo
The oxidation behavior of austenitic stainless steels with 0 and 2.5 wt% Al exposed to 500–600 °C supercritical water was studied. The oxidation rate-temperature dependence of base steel (0 wt% Al) followed the conventional Arrhenius law, while the alumina-forming austenitic stainless steel (AFA steel, 2.5 wt% Al) exhibited an anomalous oxidation rate-temperature dependence, which is attributed to
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Exploration of high-temperature oxidation resistance laws in ultra-high temperature boride ceramics through data-driven approaches Corros. Sci. (IF 8.3) Pub Date : 2024-02-22 Wenjian Guo, Lingyu Wang, Li’an Zhu, Zhouran Zhang, Yicong Ye, Bin Yang, Shifeng Zhang, Shuxin Bai
This study employed machine learning that leverage historical experimental data to construct predictive models capable of estimating the oxidation resistance of ultra-high-temperature diboride. The support vector machine regression (SVR) model exhibited superior prediction metrics with of 0.88. The Shapley-Additive-exPlanations and genetic algorithm symbolic regression models revealed that SiC content
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Study of temperature effect on hydrogen embrittlement in X70 pipeline steel Corros. Sci. (IF 8.3) Pub Date : 2024-02-22 Xiao Xing, Zhiwen Pang, Hao Zhang, Jianguo Liu, Gan Cui
The study investigates the temperature effect on hydrogen embrittlement (HE) in X70 steel using Devanathan-Stachurski and tensile tests under varying cathodic hydrogen-charging currents. The most severe HE temperature threshold is identified via scanning electron microscope (SEM) and electron backscatter diffraction (EBSD) methods. The temperature thresholds for 10 mA/cm and 20 mA/cm are 293 K and
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Pt-modification on the thermal cycling behavior of NiCoCrAlYTa coating: A case study Corros. Sci. (IF 8.3) Pub Date : 2024-02-22 Y.Y. Li, C. Zhang, H.Z. Ji, Y.M. Jiang, T.Y. Liu, S. Li, Z.B. Bao, N. Xu, S.L. Zhu, F.H. Wang
A NiCoCrAlYTa coating possessing homogenous microstructure was fabricated by high velocity oxygen fuel (HVOF) technique, in which some of the coating samples were electroplated with a thin layer of Pt. After vacuum annealing, thermal cycling tests of the NiCoCrAlYTa coatings with and without Pt modification were carried out at 1050 °C till 1000 cycles. The results revealed that Pt modification has
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Formation mechanism of (Ti, Zr, Hf)C medium-entropy carbide derived from polymer precursors and its modification on the ablative mechanism of C/C-SiC composites Corros. Sci. (IF 8.3) Pub Date : 2024-02-21 Xiaxiang Zhang, Xin Yang, Xiao Luo, Yuanqi Weng, Cunqian Fang, Qizhong Huang
Medium-entropy carbide (MEC) of (Ti, Zr, Hf)C was synthesized and its modification on the ablative mechanism of C/C-SiC composites was investigated. After 60 s oxyacetylene flame test, the mass and linear ablation rates were 1.43 mg/s and 11.1 μm/s, respectively. The evolution of ceramics oxide scale dominated the anti-ablation process, which transfers from (Ti, Zr, Hf)CO, (Ti, Zr, Hf)SiO to (Ti, Zr
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Effects of carbon source starvation and riboflavin addition on selective corrosion of welded joint by Desulfovibrio vulgaris Corros. Sci. (IF 8.3) Pub Date : 2024-02-21 Qin Wang, Binbin Wang, Xiaobao Zhou, Zhuowei Tan, Minghua Zhang, Jun Luo, Yong Wang, Tangqing Wu
This study systematically explores the impact of carbon source starvation (CCS) and the addition of on the corrosion of X80 welded joints by . The results showed that the corrosion of the welded joint was apparently selective under the independent action of CCS or addition, while the selectivity distinctly decreased under their combined action. More grain boundaries and higher proportion of the low-angle
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Effects of Bi on microstructure and corrosion behavior of Zr-1 Nb alloy in 500 °C/10.3 MPa superheated steam Corros. Sci. (IF 8.3) Pub Date : 2024-02-21 Zhao Tian, Jianchao Peng, Xiaodong Lin, Yiyu Hu, Meiyi Yao, YaoPing Xie, Xue Liang, Bangxin Zhou
The effects of Bi on the microstructure and corrosion behavior of Zr-1 Nb alloy in superheated steam at 500 °C/10.3 MPa were investigated. Results revealed that addition of trace amount of Bi improved the corrosion resistance of Zr-1 Nb alloy. Based on the experimental and DFT calculation results, we propose that the reduction of micro-pores and micro-cracks in the oxide film is mainly attributed to
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Unraveling the effect of Al2O3-MnS complex inclusion on the pitting corrosion behavior of dual phase steel Corros. Sci. (IF 8.3) Pub Date : 2024-02-21 Heng Chen, Guosheng Ma, Lin Lu, Yunhua Huang, Xiaogang Li
Pitting corrosion behavior of dual phase steel triggered by AlO-MnS complex inclusion in NaCl solution was investigated. Results indicated that neither micro-defects nor strain fields existed around the insulating AlO-MnS inclusion, but an open circular pit was immediately initiated around the inclusion and grew in diameter approaching 200 μm in several minutes. The preferential dissolution of unstable
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Effect of environmental media on the growth rate of fatigue crack in TC4 titanium alloy: Seawater and air Corros. Sci. (IF 8.3) Pub Date : 2024-02-21 J.Q. Ren, L. Li, Q. Wang, C. Xin, Q. Gao, J.C. Li, H.T. Xue, X.F. Lu, F.L. Tang
The fatigue crack growth rate of TC4 alloy in seawater is significantly faster than that in air. In order to analyze the behind reasons, the crack propagation path are investigated by scanning electron microscopy in conjunction with electron backscattering diffraction. The results indicates that the complex ionic environment in seawater can diminish the resistance of the fatigue crack growth. Especially
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Additive manufactured corrosion-resistant SS316L/IN625 functionally graded multi-material in hydrofluoric acid (HF) environment Corros. Sci. (IF 8.3) Pub Date : 2024-02-20 Shuyao Zhang, Hailong Dai, Yajing Li, Zhe Zhang, Sheng Chen, Meng He, Bo Zhang, Yushan Ma, Xu Chen
Multi-materials were designed for the severe corrosion environment in fluorine chemical industry. Directed energy deposition with laser beam (DED-LB) was used to manufacture SS316L/IN625 multi-materials with direct combination (DC) and graded transition (GT) structures. Partial immersion tests in 40% HF solution were conducted. The corrosion rate of SS316L/IN625 multi-materials was less than 1 mm/y
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Dual-function yttrium-silicate-modified SiC ceramics with prominent antioxidant performance Corros. Sci. (IF 8.3) Pub Date : 2024-02-20 Qin Ma, Shuang Mu, Yu Zhang, Xu Shen, Yudong Xue, Han Luo, Jinshan Yang, Shaoming Dong
The oxidation of dense yttrium-silicate-modified and unmodified SiC-based ceramic (YPS-SiC and RMI-SiC) at 1200, 1300, and 1400 °C was studied. Oxide scale formed on the surface protects internal ceramics from further oxidation. YSiO promoted the rapid crystallisation of cristobalite and no large catastrophic bubbles were observed. The high-crystallinity oxide scale of YPS-SiC slowed down the diffusion
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Clarifying the alloying effects of La and Ce on the pitting corrosion behaviour of Al-based metallic glasses Corros. Sci. (IF 8.3) Pub Date : 2024-02-19 Qi Wang, Suode Zhang, Jingping Cui, Shaopeng Pan, Wilfred Emori, Jianqiang Wang
The effects of La and Ce on the stability of the passive films and dissolution characteristics of Al-based metallic glasses were comparatively investigated. The results showed that the alloy with the addition of La had superior pitting resistance. This is because, firstly, La doping decreased the carrier density and increased the electron work function of the passive film, making it more stable, thereby
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On oxidation film structure of SIMP steel exposed in stagnant oxygen-saturated LBE at 600 °C Corros. Sci. (IF 8.3) Pub Date : 2024-02-18 Lingling Zhang, Wei Yan, Xianbo Shi, Yanfen Li, Quanqiang Shi, Yiyin Shan, Ke Yang, Shijian Zheng
To understand the impact of multilayered oxide films on the liquid-metal resistance, SIMP steels with three different Si levels were investigated. A novel composite oxidation film, namely amorphous SiO packed by CrO, was formed along the prior high-angle grain boundaries in internal oxidation zone to impede the inward diffusion of oxygen. Evolved into the inner layer, the amorphous SiO films stayed