ABSTRACT The present work reports the application of 1,3,5-tris(4-methoxyphenyl)-1,3,5-triazinane for the inhibition of X60 steel corrosion in 3.5% NaCl saturated with CO2. The compound was synthesized using a facile ultrasonic irradiation method, and for the first time, a comparative analysis of the static and hydrodynamic conditions was performed. The results of open circuit potential (OCP) vs. time

ABSTRACT This paper reports a systematic study of longer-term marine atmospheric and immersion corrosion losses for mild steel alloyed with small to moderate amounts (0, 2, 4, 6 and 8% by weight) of aluminium. Such steel coupons were exposed for up to 3 years in temperate sea water and also just below the mud-line, and for up to one year at two severe atmospheric marine locations. Compared with the

ABSTRACT The paper aims to show how the performance of paint coatings is affected by their composition. Samples of two paint coatings, which had delaminated in service, were compared with the same type of paint applied to samples for the purposes of certification. The particle size distribution of the filler materials (inert pigments) affected the flow of resin and wetting of the particles. In both

In this work, multifunctional Ag-based ternary nanocomposites were prepared using a simple one-pot in situ polymerisation reaction. Attapulgite (ATP) was used as a supporter to deposit Ag nanoparticles (AgNPs) and polyaniline (PANI) on the surface of ATP nanorods. The morphology and structure of the ATP/PANI/AgNPs nanocomposites were investigated by transmission electron microscope and X-ray diffraction

A theoretical and experimental systematic study was performed to determine the structural characteristics and functionality that siderophores must have to be used as ecological corrosion inhibitors. Analyses demonstrated that the hydroxamate functional group is the best siderophore that could be used as a corrosion inhibitor of neutral or acidic environments because it would form a smart protective

This paper reports pitting corrosion loss data of AA5005-H34 aluminium alloy immersed in natural seawater for up to 2 years. It is shown that the data for mass loss, maximum pit depth and the average value of 15 deepest pits as a function of exposure time are not closely consistent with the classical power-law function. Instead, the data show a greater affinity to the early part of a bi-modal trend

The applicability of an accelerated test technique using tapered tensile specimens for investigating the stress corrosion crack (SCC) initiation behaviour of structural materials in high-temperature water was assessed in the framework of a European collaborative research project (MICRIN – MItigation of CRack INitiation). The main advantage of using a tapered geometry is, that in a single test a stress

Indian pressurised heavy water reactors use Incoloy 800 for steam generators. The pH is maintained alkaline to check corrosion in secondary circuit by the addition of Ethanolamine (ETA). Effect of octadecylamine (ODA) for further reduction of corrosion is investigated. Incoloy was exposed to both steam and liquid phases at 200°C in an autoclave for 7 days. Concentration of ETA was kept constant at

Experimental investigation on the relation of grinding induced surface residual stresses (RS) with stress corrosion cracking (SCC) susceptibility and electrochemical behaviour was conducted on 316L austenitic stainless steel in 3.5% sodium chloride aqueous solution. Grinding was done with the same process parameters to lower the effect of other known parameters on SCC initiation. The corrosion behaviour

ABSTRACT Some three hundred mainly steel shipwrecks from both World Wars lie buried at shallow depths along the Belgian North Sea coast. They were examined recently to estimate corrosion rates over periods in excess of 100 years. The rate was estimated by comparing the measured in-situ steel plate thicknesses with archived ship information. The estimates show distinctly lower long-term corrosion rate

Using a complex of physical and electrochemical methods, the effect of R-substituent on the adsorption of 5-R-3-amino-1,2,4-triazoles on copper surface in neutral buffer solution was studied. Minimum concentrations C min, which suppresses the first anodic peak of copper dissolution were found, and two different linear correlations of log C min values on induction constant σI were plotted: for compounds

High-Mn twinning-induced plasticity (TWIP) steels have been proposed to meet higher passenger safety and crash-safe vehicle frame requirements demanded by the automotive industry. The corrosion behaviour of welded Fe–30Mn–5Al–0.5C–6Cr TWIP steel using the resistance-spot-welding (RSW) technique was studied. Welds showed a microstructure consisting of primary austenite dendrites and interdendritic δ-ferrite

Effects of Ca addition on as-cast microstructure, mechanical and corrosion properties of Mg–2Zn–0.3Sr alloy were investigated for biodegradable implant application. First, a comparison between Ca and Sr addition in Mg–2Zn alloy was studied. Mg–2Zn–0.3Sr showed the better corrosion performance, but the worse mechanical property. Then, the results of Ca addition indicated that the dendritic phases dispersed

Corrosion of reinforcing steel embedded in kaolinite clay was studied for a two year exposure period. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarisation (POL) revealed a decrease of the corrosion rate (CR) of the steel bars up to average values of 2.5 μm y−1. X-ray photoelectron spectroscopy (XPS), and Scanning electron microscope (SEM) equipped with Energy-dispersive X-ray

The corrosion behavior of 2205 duplex stainless steel (2205 DSS) was investigated by atomization tests, which was performed in an S-bearing thin electrolyte layer used as the artificial industrial-marine environment. Electrochemical methods and X-ray photoelectron spectroscopy (XPS), were conducted to reveal the protection properties and the composition evolution of the passive film. The results indicated

Sn–Sb solder alloys (2; 5.5 and 10wt-% Sb) were directionally solidified with a view to permitting the effect of a wide range of solidification cooling rates to be related to the resulting microstructure, which is shown to be formed by a cellular Sn-rich matrix with Sn–Sb intermetallic particles (IMCs) randomly distributed in the matrix The corrosion resistance of these alloys is investigated by electrochemical

In this paper, the statistical analysis of fluctuation characteristics of pipeline potential under dynamic DC stray current interference was carried out based on field test data. Then a self-designed experimental set-up was applied to study the corrosion behaviour of X70 steel in soil-simulating conditions. The statistical results showed that under the dynamic DC stray current interference, the pipeline

Corrosion has become a frequent and significant issue in the electronics industry. For this reason, galvanic corrosion of soldered joints, i.e. when solder alloys are in contact with a metallic substrate, is so important. The present study aims to investigate the corrosion behaviour of the Bi-2.7wt-%Zn solder alloy when in contact with Cu and Ni substrates in a 0.06M NaCl solution. Polarisation curves

Literature data on the influence of concrete cracks on corrosion propagation of reinforcing steel are contradictory. This might be due to very different exposure and test conditions but also to a lack of time-resolved data in cyclic wetting–drying exposure. Here, the influence of the environmental conditions on the corrosion rates in cracked concrete is studied experimentally. The results show that

Under-deposit corrosion (UDC) is one of the main factors leading to perforation or leakage of gathering pipeline in the oilfield. In this paper, galvanic corrosion of mild steel under CaCO3 deposit was investigated by using wire beam electrodes (WBE) in the oilfield-produced water. Potential and galvanic mappings indicated that the wire electrodes covered by CaCO3 deposit mainly acted as anode while

Tapered specimens were used for an accelerated test technique to study the crack initiation of high Si stainless steel by means of constant elongation rate tensile testing in a simulated pressurised water reactor environment. Detailed crack density distributions were obtained by applying an advanced crack detection algorithm on iteratively displaced scanning electron microscopy pictures featuring stress

Pitting corrosion of aluminium alloy AA5005-H34 immersed in natural sea water for up to 2 years is presented, together with new interpretations of the development of the pitting process over extended exposure periods. Trenching initiated at surface-located Fe-rich intermetallic (IM) particles. It occurred more extensively in sea water compared to atmospheric exposures. With increasing exposures, the

ABSTRACT In suspected cases of COVID-19 infection, the World Health Organization has recommended the thorough cleaning of surfaces and the application of commonly used hospital-level disinfectants are effective procedures. The new virus situation has changed the sanitary habits of industries and this will potentially have anadverse effect on surfaces highly exposed to disinfectants that are often chlorinated

This paper presents various models (dose–response functions, DRFs) for predicting the first-year corrosion losses of structural metals for areas with marine and marine–urban (industrial) atmospheres. The prediction results for the first-year corrosion losses (C 1 pr) calculated by the DRF from the ISO 9223 standard and by the DRF developed by us are presented. A comparative assessment of the results

The corrosion behaviour and the remaining safe service life of tubing in simulating production well of polymer flooding in Xinjiang oilfield which located in China was investigated using weight loss measurement and surface characterisation. The results showed that as the chloride ion concentration, temperature and H2S content increased, the corrosion rate of N80 steel gradually increased in the hydrolysis

To obtain information on the mechanism of microbiologically influenced corrosion (MIC) under anaerobic conditions, metabolic processes and microbial community dynamics were analysed for MIC of carbon steel with lake-mud microbial consortium as inoculum. During one month of MIC experiment, the microbial consortium corroded carbon steel with sulphate reduction, methane and acetate production. The bacterial

The central concept of microbiologically influenced corrosion is ‘biofilm’. However, it is neither a 100% biological fabric nor a film. While biofilms though mechanisms such as establishment of differential aeration cells can accelerate corrosion, under certain circumstances such as thickening may also decelerate corrosion. In this article, these mechanisms will be discussed. Along with that, this

Smart containers can be produced with polyelectrolyte multilayers that can release inhibitors in response to environmental changes at the coating defects. In this study, mesoporous TiO2 hollow spheres were adopted as carriers for the encapsulation of corrosion inhibitor. The inhibitor-loaded TiO2 containers were modified by polyelectrolyte shells using layer-by-layer self-assembly technology. The release

To study the corrosion behavior of galvanized steel wires under stress, the influence of stress level, pH value, Cl- concentration and the coupling effect on the corrosion rate of cable steel wire were discussed through stress corrosion test. The prediction formula of corrosion rate of steel wire was established based on response surface method. The constitutive model of steel wire was also put forward

It is of great significance to establish a reliable correlation between the field exposure damage and lab simulation measurements for marine atmospheric corrosion of Mg alloys. In this study, the corrosion behaviour of pure Mg, AM60, ZE41 and AZ91D was investigated in the real marine atmosphere and the simulated environments, such as salt spray and simulated sea wave impact by means of weight-loss

Graphene and its derivatives, such as reduced graphene oxide (RGO) possess excellent mechanical properties and outstanding thermal and electrical conductivity. These nanoparticles offer a wide range of possibilities for applications in the oil and gas industry. This study aimed to evaluate the effect of RGO/graphite additions on the properties of anti-corrosion paints. The nanocoating of epoxy containing

(2020). Impact of hydroxide ion–chloride ion concentration ratio on crack electrochemistry. Corrosion Engineering, Science and Technology: Vol. 55, No. 7, pp. 574-578.

ABSTRACT In the present study, a novel task-specific benzimidazolium ionic liquid with silyl substitution was synthesised and successfully introduced as a corrosion inhibitor. The inhibitory effect of 2-benzyl-1-butyl-3-(3-(triethoxysilyl)propyl)-1H-benzo[d]imidazolium chloride (BTOSPB) in HCl solution on steel corrosion was evaluated by electrochemical measurement and surface studies including scanning

ABSTRACT The corrosion performances of the EH 36 carbon steel in stagnant and flowing natural sea water and synthetic sea waters were investigated. Results show that the general corrosion rates of the steels are close in stagnant natural sea water and synthetic sea waters. The corrosion rate, corrosion feature and the rust components of the steels in flowing 3.5% NaCl solution were significantly different

ABSTRACT In this work, hot-dip galvanised steel wires were exposed in Belgium and Indonesia for 4.5 years and correlation of corrosion products formed on the exposed wires with their corrosion properties was studied. Corrosion products were identified with local Raman analysis and correlated with corrosion activity based on odd random phase electrochemical impedance spectroscopy and Tafel behaviour

ABSTRACT Parameters characterising the properties of soils used as backfill in immediate contact with cast iron pipes exhumed from a variety of soils after up to 129 years exposure are used together with average annual precipitation to estimate the average time of wetness. This is shown to correlate closely with pipe wall corrosion penetration. The possibility of microbiologically influenced corrosion

ABSTRACT By analysing the results of corrosion potential, EIS, SEM and XRD test of zinc-rich coatings (ZRCs) in 3.5wt-% NaCl solution, it was found that conductive pigment (di-iron phosphide, Fe2P) can accelerate the activation and corrosion rate of zinc powders in ZRCs, but too fast corrosion rate can reduce the cathodic protection and shielding of ZRCs. Silane improves the mechanical properties and

ABSTRACT The flagship congress of the European Federation of Corrosion (EFC), EUROCORR 2019, was held under the theme of ‘New Times, New Materials, New Corrosion Challenges’ at the Barcelo Sevilla Renacimiento, Seville, Spain, from 9 to 13 September. This major corrosion event will be reviewed in four parts over four issues, with the technical sessions on Cathodic Protection (including CP in the Marine

(2020). CES & T special edition to commemorate the contribution of professor Brain Cherry to corrosion engineering. Corrosion Engineering, Science and Technology: Vol. 55, A Celebration of the Career of Professor Brian Cherry, pp. 281-282.

The most known model is that published by Tuutti with two phases in time: corrosion initiation and propagation. In this model the corrosion initiation phase has been frequently considered, but the corrosion propagation phase has been seldom addressed. In the present work the propagation phase is generalised to not being only with a constant corrosion rate, but also with the alternatives of presenting

(2020). Correction. Corrosion Engineering, Science and Technology: Vol. 55, A Celebration of the Career of Professor Brian Cherry, pp. 341-341.

Research into non-toxic rare earth metal organic compounds providing an alternative to chromates as corrosion inhibitors was pioneered by research at Monash University almost 20 years ago. Further work at Monash and Deakin universities developed lanthanum 4 hydroxy cinnamate, which proved to be as effective as chromate for steel in chloride solution. Recently, attention has turned to substituting the

Galvanic corrosion of samples consisting of coated aluminium alloy 7075-T6 panels connected to stainless steel 316 fasteners was examined. Two coating systems were evaluated, one containing chromate pretreatment and primer along with a topcoat, and the other a chromate free system. No intentional defects such as scribes were imparted to investigate the attack associated with intrinsic defects in the

The effect of thiosulphate/H2S on crevice corrosion behaviour of P110 carbon steel in the CO2-saturated 3.5 wt% NaCl solution was investigated. The results showed that crevice corrosion of P110 steel could not occur in the CO2-saturated solution, likely due to the inhibition of both anodic and cathodic reactions inside crevice. Further, the structure of corrosion product film along the crevice wall

Corrosion was correlated with fluid-structure based on a comparative investigation of the corroded surface morphology of mild steel and the microscopic feature of oil–water mixture. It was found that the corrosion rate increased with increasing water cut and flow rate, while the corrosion morphology closely relied on the mixing state of oil and water. In high-pressure CO2 saturated water-in-oil emulsions

The intergranular corrosion (IGC) susceptibility of the Ti–Nb-stabilised ultra-pure 430LX FSSs with 0–0.47 wt-% tin addition was investigated using double loop electrochemical potentiokinetic reactivation (DL-EPR) and oxalic acid etch tests. The result of DL-EPR test reveals that IGC resistance increases with the increase in tin content. The specimens with different contents of tin exhibit the same

In this study, the corrosion resistance of commonly used plumbing materials was evaluated when three disinfection treatments were applied in hot water distribution systems. In particular copper, brass, stainless steel and galvanised steel were tested in environments containing monochloramine, chlorine dioxide and hydrogen peroxide disinfectants under real field conditions for a long period of time

The corrosion behaviour of electrochemically induced surface annealed (EISA) 304L stainless steel was analysed using a range of electrochemical methods, such as polarisation, impedance and Mott–Schottky techniques. Secondary ion mass spectroscopy was used to examine the elemental distribution around the surface of an EISA-treated specimen. The results showed that the EISA treatment increases the resistance

The effect of silty sand on the pre-passivation behaviour of 1Cr steel in a CO2 aqueous environment was investigated by electrochemical measurements and immersion tests. The results indicated that the cathodic reaction was accelerated by silty sand at the initial corrosion stage, but it was inhibited during the late corrosion stage. The corrosion film presenting as one single layer structure under

In this study, the oxidation behaviour of alloy 617, alloy 740, alloy HR6W and Sanicro 25 was investigated in SCW and vapour environment at 650°C for 320 h. The weight gain and the thickness of the oxide films of samples after exposure in SCW are higher than that in vapour. Inner oxidation phenomena were observed on alloy HR6W and Sanicro 25, which have higher content of Fe. The structure of the oxide

Air-assisted steam injection is used as a secondary or tertiary oil recovery technology. During closing, downhole tubular goods are subject to corrosion in a mixed oxygen–steam–hot solution environment. This study investigates the influence of air injection pressure, temperature and Cl− ion concentration in the injection water on the corrosion of P110 steel. Results show that high air injection pressure

ABSTRACT The corrosion inhibition performances of thiourea (TU), l-cysteine (CYS), sodium dodecyl sulfonate (SDS), tetradecyl trimethyl ammonium bromide (TTAB), N-benzyl pyridinium chloride (BPC) and imidazoline quaternary ammonium salt (IAS) in CO2-saturated and CO2/H2S coexistent brine solutions were investigated by electrochemical measurement, weight-loss test, molecular dynamics simulation and

ABSTRACT Hot-dipped galvanised (HDG) steel and Zn5Al-coated steel were exposed for 6 years at different atmospheric weathering sites worldwide. The mass loss of the coatings has been measured after 1, 2, 4 and 6 years of exposure. In addition, corrosion products have been determined using scanning electron microscopy, X-ray diffraction and FTIR spectroscopy. It is shown that Zn5Al is better than HDG-steel

Inhibition effect of oleic acid hydrazide (OAH), a green corrosion inhibitor on API X70 steel in an Indian oilfield produced water was investigated for the first time under flow condition. The test was carried out at a more critical location (90-degree pipe elbow) in a circulating loop system with the fixed flow velocity. This location is deliberately chosen because, at this location, catastrophic

ABSTRACT The optimisation process of the orthogonal experiment was designed by Taguchi experiment. Nanopores structure was prepared on the surface of stainless steel by anodic oxidation in the nitric acid solution containing sodium chloride and thiourea, and the nanopores were expanded in the solution containing sodium chloride, hydrochloric acid and sulfuric acid. The range and variance analysis results

The flagship congress of the European Federation of Corrosion (EFC), EUROCORR 2019, was held under the theme of ‘New Times, New Materials, New Corrosion Challenges’ at the Barcelo Sevilla Renacimiento, Seville, Spain, from 9–13 September. This major corrosion event will be reviewed in four parts over four issues, with the technical sessions on Automotive Corrosion, Corrosion and Corrosion Protection

Professor Brian Cherry was always been a firm believer in understanding first the fundamentals of any aspects of corrosion science, then the mechanisms, before embarking on the engineering of solutions to the management of materials corrosion. So it was with steel-reinforced concrete. This paper endeavours to walk a reader through the fundamental and mechanistic aspects of the excellent protection

Soft film corrosion-preventive compounds (CPC) were studied using ASTM B117 accelerated corrosion testing method and a special test specimen. The tested CPCs included a commercial product and homemade CPCs with a generic formulation containing paraffin wax, petrolatum, corrosion inhibitors and surfactants. Carbon steel substrates coated with CPCs containing corrosion inhibitors and surfactants showed

Cathodic protection prolongs the service life of fluid transport and offshore engineering components by suppressing corrosion. This study assesses the effect of two cathodic protection methods, such as impressed current cathodic protection (ICCP) and sacrificial anode cathodic protection (SACP), on three ferrous-based materials under laboratory-controlled corrosive wear conditions. The SACP was as

Recent work has indicated that a galvanic as well as chemical protection mechanism may control the intergranular stress corrosioncracking (IG-SCC) mitigation achieved by Zn-rich primers on Al-Mg alloys [1]. The effect of Zn salt species content added to the bulk NaCl environment on IG-SCC severity at -0.9 VSCE was evaluated using a highly susceptible condition of AA5456-H116. Linear elastic fracture