The effect of deformation on metastable pitting of 304 stainless steel in chloride contaminated concrete pore solution

Feng, Xingguo; Lu, Xiangyu; Zuo, Yu; Zhuang, Ning; Da, Chao‐Shan

doi:10.1016/j.corsci.2015.11.022

Cited by 124 publications

(49 citation statements)

References 34 publications

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“…Thus, the effects of stress on surface activation and subsequent passivation in an aqueous electrolyte are similar to those observed under ambient air conditions. These data are in agreement with previously reported OCP measurements performed on AISI 305 steel in a NaCl electrolyte [18].…”

Section: Straining Of An Aisi 304 Tensile Sample In An Aqueous Electrsupporting

confidence: 93%

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Effect of Tensile Stress on the Passivity Breakdown and Repassivation of AISI 304 Stainless Steel: A Scanning Kelvin Probe and Scanning Electrochemical Microscopy Study

Назаров

Vivier

Vucko

et al. 2019

J. Electrochem. Soc.

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The interplay between mechanical stresses and electrochemical reactions may lead to stress corrosion cracking or hydrogen embrittlement for many materials. In this work, the effect of the tensile stress on the electrochemical properties of AISI 304 stainless steel was studied using scanning Kelvin probe (SKP) in air and scanning electrochemical microscopy (SECM) in an aqueous 0.5 M Na 2 SO 4 electrolyte. The measurements were performed under load-and load-free conditions. No influence of the elastic stress on the electrochemical potential of the steel was found. In contrast, the plastic strain induces dislocations and dislocation pileups , which emerge to the surface. The formation of new active surfaces is accompanied by an increase in the roughness and a 150-200 mV decrease in the steel potential. After activation, the potential increased due to passivation of the emerging surfaces by a newly grown oxide film, which took place under both the load and load-free conditions and followed a time dependence of = A log t + B. Formation and then passivation of the new surfaces increased and then decreased the reduction current of the mediator in the SECM measurements. The effect of residual stress stored in the steel due to the development of dislocations on the reactivity of the re-passivated surface was investigated.

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Section: Straining Of An Aisi 304 Tensile Sample In An Aqueous Electrsupporting

confidence: 93%

“…Plastic deformation of stainless steel may modify the passive oxide film [16][17][18][19][20] and the alloy bulk [21][22][23][24]. It has even been shown that elastic deformation due to local microplasticity can produce microcracks in the passive film and accelerate dissolution [16].…”

Section: /L = B Log (T) + Const Eq 2mentioning

confidence: 99%

Effect of Tensile Stress on the Passivity Breakdown and Repassivation of AISI 304 Stainless Steel: A Scanning Kelvin Probe and Scanning Electrochemical Microscopy Study

Назаров

Vivier

Vucko

et al. 2019

J. Electrochem. Soc.

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“…Cation interstitials, cations vacancies and oxygen vacancies are the main defects of passive films on stainless steels. The Mott-Schottky approach is often used to study the semiconductor properties of the passive films on these materials 41,42 . The n-type behavior is associated with electron donors and is related with the presence of oxygen vacancies and cation interstitials whereas the p-type behavior is associated with electron acceptors and is related to the presence of cation vacancies 43 .…”

Section: Mott-schottky Analysismentioning

confidence: 99%

Electrochemical Study of the AISI 409 Ferritic Stainless Steel: Passive Film Stability and Pitting Nucleation and Growth

et al. 2017

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The aim of the present work was to study the passive film stability and pitting corrosion behavior of the AISI 409 stainless steel. The electrochemical tests were carried out in 0.1 M NaCl solution at room temperature. The general electrochemical behavior was assessed using electrochemical impedance spectroscopy (EIS) measurements whereas the semiconducting properties of the passive film were evaluated by the Mott-Schottky approach. Pitting corrosion was investigated using potentiodynamic and potentiostatic polarization tests. Surface morphology was examined using confocal laser scanning microscopy and scanning electron microscopy (SEM). Energy dispersive X-ray spectroscopy (EDS) analyses were carried out to identify the composition of precipitates that could act as preferential sites for the onset of pitting corrosion. The results showed that the passive film presents n-type semiconductive behavior. Grain boundaries played an important role as pitting initiation sites for the AISI 409 stainless steel.

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“…In terms of the nature of atmospheric corrosion, it is that the corrosion of metals occurs under thin electrolyte film or even adsorbed layers, which is also the electrochemical reaction between micro‐anodes and micro‐cathodes . Many investigations on the corrosion behavior of metals under thin electrolyte layers (TEL) have widely been conducted.…”

Section: Introductionmentioning

confidence: 99%

Influences of NH₄⁺ ions and thin electrolyte layers (TEL) thickness on the corrosion behavior of AZ91D magnesium alloy

Liu

et al. 2019

Materials & Corrosion

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In this study, the influences of NH4 + ions and the thin electrolyte layer (TEL) thickness on the corrosion behavior of the AZ9D magnesium alloy in NH4+‐containing environments were investigated by electrochemical measurements and surface characterization. The experimental results indicate that NH4+ greatly accelerates the corrosion of AZ91D magnesium alloy whether in a bulk solution or in a TEL. As the TEL thickness decreasing, the corrosion resistance of the AZ91D magnesium alloy is strengthened. According to the corrosion morphology, electrochemical analysis, and characterization analysis of corrosion products, the corrosion mechanism of AZ91D under TELs with different thicknesses is divided into three stages: (a) uniformly distributed corrosion pits with deep depth and large size when TEL thickness is higher than or equal to 500 μm; (b) slightly corrosion with randomly distributed corrosion pits and the accumulation of small amount of corrosion product when TEL thickness is between 100 μm and 200 μm; (c) no corrosion pit with only deposition of corrosion product when TEL thickness is lower than or equal to 100 μm. Among which, the roles of NH4+, TEL thickness, and corrosion product are emphasized and discussed in the corrosion process of AZ91D magnesium alloy under TEL with different thicknesses.

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The effect of deformation on metastable pitting of 304 stainless steel in chloride contaminated concrete pore solution

Cited by 124 publications

References 34 publications

Effect of Tensile Stress on the Passivity Breakdown and Repassivation of AISI 304 Stainless Steel: A Scanning Kelvin Probe and Scanning Electrochemical Microscopy Study

Effect of Tensile Stress on the Passivity Breakdown and Repassivation of AISI 304 Stainless Steel: A Scanning Kelvin Probe and Scanning Electrochemical Microscopy Study

Electrochemical Study of the AISI 409 Ferritic Stainless Steel: Passive Film Stability and Pitting Nucleation and Growth

Influences of NH₄⁺ ions and thin electrolyte layers (TEL) thickness on the corrosion behavior of AZ91D magnesium alloy

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The effect of deformation on metastable pitting of 304 stainless steel in chloride contaminated concrete pore solution

Cited by 124 publications

References 34 publications

Effect of Tensile Stress on the Passivity Breakdown and Repassivation of AISI 304 Stainless Steel: A Scanning Kelvin Probe and Scanning Electrochemical Microscopy Study

Effect of Tensile Stress on the Passivity Breakdown and Repassivation of AISI 304 Stainless Steel: A Scanning Kelvin Probe and Scanning Electrochemical Microscopy Study

Electrochemical Study of the AISI 409 Ferritic Stainless Steel: Passive Film Stability and Pitting Nucleation and Growth

Influences of NH4+ ions and thin electrolyte layers (TEL) thickness on the corrosion behavior of AZ91D magnesium alloy

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Product

Resources

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Influences of NH₄⁺ ions and thin electrolyte layers (TEL) thickness on the corrosion behavior of AZ91D magnesium alloy