Influence of cold working on the pitting corrosion resistance of stainless steels

Peguet, Lionel; Malki, B.; Baroux, B.

doi:10.1016/j.corsci.2006.08.021

Cited by 200 publications

(97 citation statements)

References 54 publications

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“…9,10 This reflects the complex structure of an alloy surface at both atomic and mesoscale levels, which results in a large number of possible atomic configurations, causing variability in the observed dissolution rates.…”

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confidence: 99%

Ab Initio Monte Carlo Simulations of the Acidic Dissolution of Stainless Steels: Influence of the Alloying Elements

Malki¹,

Saedlou²,

Guillotte³

et al. 2016

J. Electrochem. Soc.

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International audienceAcidic dissolution of ferritic stainless steels is simulated using the ab initio based Monte Carlo technique. This approach aims to reach a better understanding of the effect of alloying elements on the acidic dissolution of SS at the microscopic scale. The dissolution probability of a surface atom is shown to depend drastically on the number and chemical nature of its nearest neighbors in dense emerging crystallographic planes. A "critical coordination number" (CCN) is defined, above which the dissolution probability is too low to contribute significantly to the dissolution rate, and below which the dissolution events are too fast to be experimentally detected. For pure alpha-Fe and FeCr alloys this CCN was found to be equal to 4. Increasing the Cr concentration does not change the CCN but decreases the interatomic bonding energy, making the dissolution process easier. The addition of Mo is found to involve multiple CCN, belonging to different crystallographic orientations, which results in a substantial decrease of the dissolution kinetics. (C) The Author(s) 2016. Published by ECS. All rights reserved

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confidence: 99%

Ab Initio Monte Carlo Simulations of the Acidic Dissolution of Stainless Steels: Influence of the Alloying Elements

Malki¹,

Saedlou²,

Guillotte³

et al. 2016

J. Electrochem. Soc.

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“…A less protective passive film was created by cold working, which was attributed to the presence of defects such as dislocation pile-ups. 1,14 A study of austenitic stainless steel showed that cold work and plastic deformation lead to the formation of dislocations and α-martensite that decreased the ability of the steel to passivation. 1,15,16 Martensite was formed in deformed areas, where slip planes intercepted the passive film and a large number of dislocations may be concentrated.…”

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Effect of Mechanical Stress on the Properties of Steel Surfaces: Scanning Kelvin Probe and Local Electrochemical Impedance Study

Назаров

Vivier

Thierry

et al. 2017

J. Electrochem. Soc.

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The influence of mechanical stress on the electrochemical properties of ferritic steel SAE 1008 and austenitic stainless steel 301LN was studied using Scanning Kelvin Probe and Localized Electrochemical Impedance Spectroscopy (LEIS) techniques. The probeworking electrode Volta potential difference was mapped in situ under load. It was found that the influence of elastic deformation on the potential was small. Plastic deformation decreased the potential of steel by 150-300 mV, whereas the relaxation of the load from the plastic domain increased the Volta potential. However, some locations, which can contain residual stress, remained at low potential. The pre-strained surfaces were characterized by X-ray Photo Electronic Spectroscopy and by Atomic Force Microscopy. Distribution of the capacitance across strained and strain-free surfaces was studied by LEIS in boric/borate electrolyte. The plastic stress increases the capacitance and decreases the ability of the steels to passivate the surface indicating that emerging of pile-ups of dislocations create defective oxide films. Stress corrosion cracking (SCC) is a well-known complex corrosion process caused by the combination of stress and corrosion, which can lead to wear, cracking or fatigue failures. In many cases, the residual stress from plastic deformation or wear accelerates the corrosion rate.1 In the classic film rupture model, tensile stress breaks the passive film creating anodic locations at the bottom of the crack, 2,3 which propagates through an activation/passivation process. This model was developed to the "slip dissolution-film rupture model" pointing out the importance of formation of dislocations and metal dissolution through dislocation slip lines.3,4 The slip dissolution-film rupture model of crack advance was discussed in details previously. 5 This model can predict the crack growth rate for the stainless steels, nickel alloys, and low-alloy steels in high temperature water. 6 The effect of the yielding on the rate of dissolution of many metals was found to be much pronounced in comparison with the influence of elastic deformation. 7 The dissolution rate showed a marked rise at the beginning of the plastic region that is asymptotic with increasing strain. Similar effects of plastic deformation on the anodic current during dissolution were also found for stainless steels.8 To explain this mechanical-electrochemical effect, both the increase of dissolution rate at slip edges and dislocations, and the increase of surface roughness from plastic deformation were pointed out.8 On the other hand, the selective slip dissolution can be ascribed to the local excess of Gibbs potential, 7,8 thus contradicting earlier works. Hoar 9 has shown that both enthalpy and entropy of activation were not significantly altered by cold work, which meant that the free energy of activation for anodic reaction should remain almost constant. A calorimetric study 10 showed that residual energy from cold work was less than 7 calories per gram without any significant impact on ...

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“…Pitting corrosion resistance of the austenitic stainless steels 304L and 316L is widely studied [3,4], but there are only few works on the AISI 444 corrosion behaviour [5][6][7][8].…”

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confidence: 99%

Improvement of pitting corrosion resistance of AISI 444 stainless steel to make it a possible substitute for AISI 304L and 316L in hot natural waters

Bellezze

Roventi

Quaranta

et al. 2008

Materials & Corrosion

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The pitting corrosion resistance of AISI 444, 304L and 316L stainless steels in two tap waters with different chloride concentrations at 80 8C was studied. Cyclic potentiodynamic polarization (CPP) tests were carried out starting from E corr À 30 mV until the current density reached 0.1 mA/cm 2 (scan rate 0.166 mV/s); the scan was then reversed and continued until new passivity conditions were achieved. The corrosion potential was measured before the polarization experiments. From the E-log i plots, the values of pitting and protection potential were obtained; from these potentials, the perfect and the imperfect passivity regions were defined to compare the corrosion resistance of the studied steels. CPP tests were performed both on as received stainless steel samples and on samples submitted to different cleaning-passivation treatments to improve their corrosion resistance. The results indicate that, for industrial production, AISI 444 stainless steel can substitute the more expensive AISI 304L or 316L after a cleaning-passivation treatment that reduces the presence of inclusions.

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Influence of cold working on the pitting corrosion resistance of stainless steels

Cited by 200 publications

References 54 publications

Ab Initio Monte Carlo Simulations of the Acidic Dissolution of Stainless Steels: Influence of the Alloying Elements

Ab Initio Monte Carlo Simulations of the Acidic Dissolution of Stainless Steels: Influence of the Alloying Elements

Effect of Mechanical Stress on the Properties of Steel Surfaces: Scanning Kelvin Probe and Local Electrochemical Impedance Study

Improvement of pitting corrosion resistance of AISI 444 stainless steel to make it a possible substitute for AISI 304L and 316L in hot natural waters

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