ABSTRACT The effect of rare earth elements Ce and Y addition on microstructure and corrosion behaviour of an extruded ZK60 magnesium alloy was investigated. Materials characterisation was performed using a scanning electron microscope and X-ray diffraction. Corrosion behaviour of ZK60 and ZK60-3x (x = Ce, Y) alloys were evaluated using electrochemical impedance spectroscopy and potentiodynamic polarisation

ABSTRACT The stress corrosion cracking (SCC) mechanism is investigated in high Si duplex stainless steel in a simulated PWR environment based on TEM analysis of FIB-extracted SCC crack tips. The microstructural investigation in the near vicinity of SCC crack tips illustrates a strain-rate dependence in SCC mechanisms. Detailed analysis of the crack tip morphology, that includes crack tip oxidation

ABSTRACT Layered double hydroxides (LDHs) can serve as corrosion inhibitor reservoirs. In the present work, hydrotalcite-like LDHs were synthesized and employed as host matrixes for the release of phosphate. The morphological and structural properties of the as-prepared LDH-PO4 were characterised by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy

ABSTRACT The flagship congress of the European Federation of Corrosion (EFC), EUROCORR 2020, was held under the above theme from the 7th to 10th September 2020. Because of the pandemic, this was held as a VIRTUAL conference. This major corrosion event has been reviewed in four parts over four issues, with this the fourth and final instalment covering technical sessions on Marine Corrosion, Corrosion

ABSTRACT The oxides formed on T12 ferritic steel surface after exposure to 560 °C/25 MPa supercritical water with dissolved oxygen contents of 300 ppb was characterised by various techniques. It was found that the weight gain and thickness of the oxide scale increase with the increasing exposure time and the oxidation kinetics of T12 followed with parabolic law. The Cr content at the outermost layer

(2021). EUROCORR 2020: ‘Closing the gap between industry and academia in corrosion science and prediction’: Part 3. Corrosion Engineering, Science and Technology: Vol. 56, No. 5, pp. 401-406.

ABSTRACT The corrosion propagation rate during natural exposure tests of powder-coated steel and the relationship between natural exposure and accelerated cyclic corrosion testing (ISO 20340) results were investigated. Generally, during natural exposure, an initial fast increase in the corrosion area followed by a period where the corroded area grows very slowly are observed. As a consequence, the

ABSTRACT The effect of different concentrations of nanoclay incorporated in the epoxy coating containing 8-hydroxyquinoline (8-HQ) on early corrosion detection, electrochemical and optical properties of the applied coating was investigated. The 8-HQ and nanoclay composite samples were characterised by UV–Vis spectroscopy, FE-SEM, EDS, XRD, EIS, fluorescence spectroscopy and microscopy. Then, the optimised

ABSTRACT Corrosion of steels in deep, cold, low oxygen sea waters over many decades often is attributed to microbiologically influenced corrosion (MIC). Herein it is argued that the available evidence does not support this proposition since (a) the few available in-situ deep sea field observations are consistent with long-term corrosion under abiotic conditions and (b) independent environmental studies

ABSTRACT The aim of the study was to define the influence of microstructural properties on the electrochemical properties of copper in four different forms: copper in sheet form, copper doped with phosphorus, electroplated copper and copper wire. Open circuit potential and polarization resistance measurements were carried out in order to determine the electrochemical properties and corrosion rates

ABSTRACT The nucleation, propagation, and rehabilitation of pitting corrosion of Al–Mg–Si Aluminium alloy (AA6063) are studied in 3%NaCl solution by using electrochemical noise measurement. It shows that the composite film composed of sequent precipitation of ceria and 1-tetradecylphosphonic acid (DPA) presents the best pitting corrosion resistance compared with the independent ceria conversion film

ABSTRACT The development of temporary protective coatings on magnesium implants is a priority in the biomedical field. In the present study, corrosion rates were determined by various techniques for powder metallurgy Mg and AZ31 magnesium alloy uncoated and coated with phytic acid (PA). Weight loss measurements, potentiodynamic polarisation, and electrochemical impedance spectroscopy were performed

ABSTRACT To examine the macro-galvanic corrosion of carbon steel near the air–liquid interface, a test panel of array electrodes was developed for investigating the corrosion behaviour in NaCl solution and wet soil environment. The corrosion rates were evaluated by electrochemical approaches and verified by the corrosion exposure tests. The analysis focused on the interaction between the macrocell

ABSTRACT This study reports the characteristics of atmosphere corrosivity parameters on the sea coasts of Russia, namely, on the Arctic and Pacific Oceans and the Black Sea. It gives the results of predictions of long-term corrosion losses for standard metals on the sea coasts of Russia. Experimental data on the first-year corrosion losses found in 19 representative locations on the sea coasts were

ABSTRACT Ultra-low cycle fatigue (ULCF) tests of corroded steel specimens were conducted to illustrate the effects of corrosion on the ULCF properties and fracture mechanism of structural steel. Fatigue crack initiation and propagation process and fracture morphology were observed respectively. The results indicate that the ULCF fracture life of corroded specimens decreases more with increasing surface

ABSTRACT The effect of ethyl cellulose (EC) micro/nanocapsules containing linseed oil (LO) on the cathodic disbonding of self-healing composite coatings is investigated by cathodic disbonding test and electrochemical impedance spectroscopy (EIS). Results reveal that the presence of EC nanocapsules significantly improves the cathodic disbonding resistance of the coatings so that the rates of disbonded

ABSTRACT The effects of elastic and plastic strain on interfacial behaviour of X52 steel in high-pH solution are studied using slow strain rate tensile testing and Electrochemical Impedance Spectroscopy (EIS). The EIS data revealed a defined relationship between capacitance and resistance with elastic strain. The strain rate influenced the metal dissolution by favouring the active rate over the passive

ABSTRACT The aging strengthening effect, stress corrosion cracking (SCC) behaviour and microstructure of 7075 aluminium alloys under double peaks aging treatment have been investigated in this paper. The results show that the hardness and strength of alloys under the second aging peak are equal or slightly higher than those under the first peak. The microstructure analysis demonstrates that the aging

ABSTRACT The flagship congress of the European Federation of Corrosion (EFC), EUROCORR 2020, was held under the above theme from 7–10 September. Because of the pandemic, this was held as a VIRTUAL conference. This major corrosion event will be reviewed in four parts over four issues, with this the second instalment covering technical sessions on Corrosion by hot gases and combustion products, Corrosion

ABSTRACT Significant discrepancies between the chemically active substance concentrations in the database and the actual environment can lead to deviations in anti-corrosion design and material selection during electronic product development and even lead to incorrect estimation of product lifetime. This literature research aims to provide a basis for updating the database of gaseous chemical concentrations

ABSTRACT FV520B stainless steel is an important material for compression turbine impellers. Its corrosion resistance at high temperatures is critical for the manufacturing and service reliability management of impellers. Therefore, this study investigated the electrochemical corrosion of FV520B stainless steel in an acetic acid solution bearing hydrogen bromine from 130 to 200 °C by potentiodynamic

ABSTRACT The porous Ni-Cr-Mo-Cu alloys were fabricated by an activation reaction sintering technique. The effects of Cr content varied from 10 to 30 wt-% on the corrosion performance of porous alloys in 10 wt-% H2SO4 solution were evaluated using weight-loss method and electrochemical techniques. The structural morphology, phase constitution and elemental distribution were characterized by scanning

ABSTRACT In the present work, polyaniline (PANI) modified attapulgite (ATP) nanocomposite was synthesized and employed as reinforcements to enhance the corrosion resistance of the alkyd coating. The morphological and structural properties of the synthesized ATP/PANI were characterized by transmission scanning electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy

ABSTRACT Specimens of AA2099-T8 were immersed for different times ranging from 2 to 180 min in 0.1M NaCl. The development of corrosion around intermetallic particles was studied by scanning electron microscopy (SEM) with energy-dispersive X-ray spectrometry (EDXS). The degradation evolution of each major intermetallic particle after exposure of the alloy to electrolyte allowed to determine which particle

ABSTRACT The susceptibility of additively manufactured (AM) and heat-treated Alloy 718 to hydrogen embrittlement was compared to that of wrought Alloy 718. Specimens were prepared from laser powder bed fusion (LPBF) coupons built with the long axis in the x-direction (horizontal printing) and with the long axis in the z-direction (vertical printing). Despite the heat treatment, coupons printed horizontally

ABSTRACT The application of biodegradable Magnesium (Mg) alloy implants is limited due to their insufficient corrosion fatigue resistance. This work investigated the influence of double extrusion on the microstructure, mechanical properties and corrosion fatigue behaviour of Mg–Zn–Y–Nd alloy. The results showed that, after double extrusion, the texture intensity was significantly weakened and a more

ABSTRACT We report the corrosion behaviour of a novel Mg–10Dy–0.7La alloy in the as-cast and solutionised conditions. The corrosion performance of binary Mg–10Dy and the new ternary Mg–10Dy–0.7La alloy was determined using a combination of immersion test, potentio-dynamic polarisation as well as electrochemical impedance spectroscopy. The results reveal that the addition of La to the Mg–10Dy alloy

ABSTRACT In this study, the corrosion behavior of X60 was investigated in the presence of a mixed culture of sulfate-reducing bacteria (SRB) and iron-reducing bacteria (IRB) via weight loss, electrochemical impedance spectroscopy (EIS), and Tafel polarization techniques. Moreover, field emission scanning electron microscope (FESEM) images and X-ray diffraction spectrometry (XRD) were used to study

ABSTRACT The combined effects of high temperatures and different acetic acid (HAc) concentrations on corrosion and deposition of FeCO3 scales on API X65 carbon steel in CO2-saturated brines were investigated. Conditions with the absence and presence of 100 and 600 ppm of HAc were evaluated under high pressure at 90°C and 120°C. Electrochemical impedance spectroscopy, linear polarisation resistance

ABSTRACT The effects of Ga addition (1, 2, 3 and 5 wt-%) on the corrosion behaviour of high strain rate rolled Mg–Ga alloys are firstly investigated by weight loss measurement and electrochemical testing. Solute Ga atoms can reduce the corrosion potential but improve the corrosion resistance of the alloy with the Ga content lower than 3 wt-%. The Mg–3Ga alloy sheet is the most corrosion-resistant with

ABSTRACT The mild carbon steel (CS) A-36 and weathering steel A-588 were exposed to the outdoor atmosphere at two different locations in tropical Panama. After a 10-year exposure, the results indicate that the chloride deposition rate and the type of steel play an important role in the corrosion behaviour of tested steels. Both types of steel mainly contain lepidocrocite and goethite as corrosion products

ABSTRACT The AZ91D magnesium alloy was processed with the addition of chemical refinement Al5Ti1B or through ultrasonic melt treatment technique. This paper studies the relationship between the corrosion behaviour and the phase’s morphology of the produced samples. Electrochemical impedance spectroscopy was carried out in Hank’s solution at 37°C for the assessment of corrosion resistance, demonstrating

ABSTRACT Carbonation-induced corrosion limits the durability of reinforced concrete structures exposed in urban environments. In these exposure conditions, the propagation phase of corrosion can be an important part of the service life and, hence the knowledge of the corrosion rate is essential for the design. However, data regarding the corrosion rate in carbonated concrete are scarce and mainly refer

ABSTRACT The present study compares corrosion behaviour of three austenitic stainless steels 316L, 317L and 904L (base materials and welds) in wet-process phosphoric acid (WPA) and reagent grade phosphoric acid with impurities, e.g., Cl-, F- and SO42-. The corrosion study was done by performing electrochemical polarisations at 50°C followed by Tafel extrapolation. Welds always had higher corrosion

ABSTRACT In this study, the isothermal and cyclic corrosion behaviours of Haynes 282 and Haynes 214 in a lithium molten salt were investigated at 650°C for 168 h and 7 thermal cycles, respectively; this was achieved by measuring the mass changes, surface and cross-sectional morphologies with their elemental distributions, and compositional changes in the subscale, substrate and spalled oxide scale

ABSTRACT Electrochemical techniques such as Polarisation and Galvanic tests as well as immersion test were used to analyse both the effects of different Bi contents and the length scale of dendritic spacings on Zn–8 wt-%Al–(1.5, 2.3 and 3 wt-%Bi) alloys on their corrosion behaviour. The results revealed that no significant differences in the corrosion kinetics were observed with the scale of the dendritic

(2021). Obituary. Corrosion Engineering, Science and Technology: Vol. 56, No. 5, pp. 495-496.

ABSTRACT Corrosion-induced degradation in marine steel structures is highly dependent on the surrounding environmental conditions and sea water compositions that varies significantly around global sea water bodies. This research investigates the corrosion behaviour of ship-grade steels exposed under different sea water compositions and environmental conditions typical of the Arabian Sea. More, environmental

ABSTRACT Bacterial biofilm that formed when the Ti6Al4 V alloy was exposed to Escherichia coli, was monitored over 48 h by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PP) to estimate the rate of corrosion and the influence of the bacteria on this process. High-resolution scanning electron microscopy was used to examine bacterial growth, colonisation and the process

ABSTRACT To develop a biomedical magnesium alloy with desirable mechanical properties and corrosion resistance, Mg–6Zn–8.16Y–2.02Mn and Mg–6Zn–8.16Y–2.02Mn–0.3Mo alloy were prepared. Then the alloys were solution-treated at 500°C for 40 h and cooled in the furnace. The results showed that partly 18R-long-period stacking ordered (LPSO) phase transformed to 14H-LPSO phase during solid-solution treatment

ABSTRACT Development of countermeasure for corrosion and hydrogen embrittlement of Ni-Ti superelastic alloy in an acidulated phosphate fluoride (APF) solution has been attempted by adding NaHCO3 and H2O2 to the solution. Upon addition of only 0.001 M NaHCO3 to a 0.2% APF solution, almost no changes in corrosion current density and corrosion potential are observed. With an increasing NaHCO3 concentration

ABSTRACT A wire beam electrode (WBE) method for investigating the crevice corrosion has been demonstrated by mapping non-uniform corrosion processes occurring on copper and copper alloys including the pure copper UNS No. C11000 (Cu), brass UNS No. C28000 (Cu–Zn alloy) and tin bronze UNS No. C51900 (Cu–Sn alloy) in mass 0.6% NaCl solution with the crevice spacings of d=103 μm and 206 μm. It was found

ABSTRACT The atmospheric corrosion of steel is a critical design and maintenance issue for structures such as electric transmission towers and bridges, which are generally widely dispersed. As airborne sea-salt particles are a major corrosion factor, the long-term cumulative spatial distributions of sea salt deposited on the structure surfaces are needed. In this study, we predict the long-term cumulative

ABSTRACT Absorbable metals have been proposed as potential materials for hard tissue scaffolding to offer both high mechanical support and bioabsorbability. Over the past 5 years, many works sought evidence of the interesting mechanical property which mimics to that of human bone with tailored corrosion behaviour. The emerging additive manufacturing (AM) technology helps to optimise the design and

ABSTRACT The flagship congress of the European Federation of Corrosion (EFC), EUROCORR 2020 was held under the above theme from the 7th–10th September. Owing to the pandemic, this was held as a VIRTUAL conference. This major corrosion event will be reviewed in four parts over four issues, with the present instalment providing an overall summary, giving titles and access to the plenary lectures, and

ABSTRACT The flagship congress of the European Federation of Corrosion (EFC), EUROCORR 2020 was held under the above theme from the 7th–10th September. Owing to the pandemic, this was held as a VIRTUAL conference. This major corrosion event will be reviewed in four parts over four issues, with the present instalment providing an overall summary, giving titles and access to the plenary lectures, and

ABSTRACT The objective of the study is to correlate the effects of temperature, H2S and Cl− concentration on the passivity limits and the onset of localised corrosion in UNS S31603 stainless steel by evaluating the changes in the semiconducting behaviour exhibited by the passive layer. The study is accomplished experimentally by using a combination of direct and alternate current electrochemical methods

ABSTRACT The results of predictions concerning the long-term corrosion losses of structural metals in the continental territory of Russia with rural atmospheres and in certain locations with urban atmospheres are presented. A power-linear model is used to predict long-term corrosion losses. Two variants for estimating the coefficients in the model are used. The first variant is presented in ISO 9224

ABSTRACT The serial-type deep-sea environmental test device was used to investigate the corrosion behaviour of 1060 aluminium exposed at real sea for 0.5 year and 2 years. Specimens were deployed at a depth of 1200, 2000 and 3000 m, respectively. A three-stage corrosion process was proposed after analysing the corrosion profile and the corrosion products of the specimens. The corrosion regularity was

ABSTRACT The serial-type deep-sea environmental test device was used to investigate the corrosion behaviour of 1060 aluminium exposed at real sea for 0.5 year and 2 years. Specimens were deployed at a depth of 1200, 2000 and 3000 m, respectively. A three-stage corrosion process was proposed after analysing the corrosion profile and the corrosion products of the specimens. The corrosion regularity was

ABSTRACT The results of predictions concerning the long-term corrosion losses of structural metals in the continental territory of Russia with rural atmospheres and in certain locations with urban atmospheres are presented. A power-linear model is used to predict long-term corrosion losses. Two variants for estimating the coefficients in the model are used. The first variant is presented in ISO 9224

ABSTRACT The objective of the study is to correlate the effects of temperature, H2S and Cl− concentration on the passivity limits and the onset of localised corrosion in UNS S31603 stainless steel by evaluating the changes in the semiconducting behaviour exhibited by the passive layer. The study is accomplished experimentally by using a combination of direct and alternate current electrochemical methods

ABSTRACT The effect of hydrostatic pressure (HP) on the corrosion behaviour of X80 steel is investigated to assist the development of deep-sea oil and gas resources. The results show that the corrosion current increases as HP increases whereas the charge transfer resistance follows the opposite trend. The corrosion products are composed of γ-FeOOH, α-Fe2O3 and α-FeOOH at atmospheric pressure, while

ABSTRACT The effect of stress on the crevice corrosion of P110 carbon steel in the CO2-saturated 3.5 wt-% NaCl solution with a small amount of thiosulphate/H2S was investigated. The results showed that the composition of corrosion products on the steel surface did not change with elastic stress while the mackinawite film formed at the crevice mouth was more easily spalled off under higher stresses

ABSTRACT The development of severe localised corrosion (SLC) on the 2198-T8 alloy was investigated in solutions of various NaCl concentrations (0.001, 0.005 and 0.01 mol L−1). Immersion tests, optical profilometry, conventional and local electrochemical analyses were performed to evaluate the corrosion behaviour of the alloy. Immersion tests showed that the alloy is susceptible to SLC in all conditions

This study investigates the H2S high-temperature corrosion characteristics of three common heat – exchanging tubes for supercritical boilers, namely SA-213T12, 15CrMoG and 12Cr1MoVG. The high-tempe...

Aluminium alloys forming the remnants of Lockheed P38 of Antoine de Saint-Exupery was identified as the 24S aluminium alloy developed in 1930s. After 60 years in sea water, thick corrosion layers c...

ABSTRACT To accurately assess the corrosion risk under dynamic AC interference, the dynamic fluctuation characteristics of the pipeline near high-speed railway were analyzed by field test data. The corrosion rate and morphology of corrosion products under natural corrosion, steady AC interference, and dynamic AC interference were compared, and the effect of AC current density and typical dynamic interference

ABSTRACT To check the reproducibility of electrochemical impedance spectroscopy (EIS) measurements, 19 laboratories have performed round-robin (RR) testing on EIS using various instruments and three different systems: a dummy cell and two electrochemical systems of practical interest in the nuclear corrosion domain. The general conclusion drawn from the tests performed with the dummy cell is that the

ABSTRACT The effect of Ti addition on the microstructure and corrosion resistance of the as-cast Ti-stabilised Fe–17Cr ferritic stainless steels was investigated by optical microscopy, scanning electron microscopy, X-ray diffraction and energy-dispersive spectrometer. The corrosion behaviour of the as-cast Fe–17Cr ferritic stainless steel in 10 wt-% HNO3 and 10 wt-% NaOH solutions was examined by using