Effect of pH and Chloride Contents on Stress Corrosion Cracking of Austenitic Stainless Steels at Room Temperature

Juang, Hsun-Kai; Altstetter, C. J.

doi:10.5006/1.3580853

Cited by 10 publications

(3 citation statements)

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“…The percentage of strain-induced martensite and deformation twins also influence the SCC initiation, due to the higher susceptibility of martensite and deformation twins to suffer SCC than the austenitic microstructure. This difference can be seen in literature, where martensitic stainless steels subjected to SCC in 3.5 wt.% NaCl at room temperature (25 • C) experience intergranular fracture with the formation of secondary cracks [141,142]; while austenitic stainless steels needed higher temperatures to develop SCC (>100 • C) [137,143], lower pH (pH < 3) [144,145], or higher chloride content (24.2 wt.% NaCl) in the case of exposure to alkaline solutions (sat. CaCl 2 ) [143,146].…”

Section: Stress Corrosion Cracking Of High-mn Twip Steelsmentioning

confidence: 86%

Corrosion Mechanisms of High-Mn Twinning-Induced Plasticity (TWIP) Steels: A Critical Review

Bastidas

Ress

Bosch

et al. 2021

Metals

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Twinning-induced plasticity (TWIP) steels have higher strength and ductility than conventional steels. Deformation mechanisms producing twins that prevent gliding and stacking of dislocations cause a higher ductility than that of steel grades with the same strength. TWIP steels are considered to be within the new generation of advanced high-strength steels (AHSS). However, some aspects, such as the corrosion resistance and performance in service of TWIP steel materials, need more research. Application of TWIP steels in the automotive industry requires a proper investigation of corrosion behavior and corrosion mechanisms, which would indicate the optimum degree of protection and the possible decrease in costs. In general, Fe−Mn-based TWIP steel alloys can passivate in oxidizing acid, neutral, and basic solutions, however they cannot passivate in reducing acid or active chloride solutions. TWIP steels have become as a potential material of interest for automotive applications due to their effectiveness, impact resistance, and negligible harm to the environment. The mechanical and corrosion performance of TWIP steels is subjected to the manufacturing and processing steps, like forging and casting, elemental composition, and thermo-mechanical treatment. Corrosion of TWIP steels caused by both intrinsic and extrinsic factors has posed a serious problem for their use. Passivity breakdown caused by pitting, and galvanic corrosion due to phase segregation are widely described and their critical mechanisms examined. Numerous studies have been performed to study corrosion behavior and passivation of TWIP steel. Despite the large number of articles on corrosion, few comprehensive reports have been published on this topic. The current trend for development of corrosion resistance TWIP steel is thoroughly studied and represented, showing the key mechanisms and factors influencing corrosion processes, and its consequences on TWIP steel. In addition, suggestions for future works and gaps in the literature are considered.

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Section: Stress Corrosion Cracking Of High-mn Twip Steelsmentioning

confidence: 86%

Corrosion Mechanisms of High-Mn Twinning-Induced Plasticity (TWIP) Steels: A Critical Review

Bastidas

Ress

Bosch

et al. 2021

Metals

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“…20,21 Indeed, during the straining some volume fraction of austenite phase is continuously transformed into martensite ', which is prone to show more severe corrosive attack than the austenite-base phase in chloride-rich environment. 2,4,20 It is also interesting to note the shift of the characteristic frequency range into low frequency regions. This effect can not be attributed to the increase of area that occurs during the SSRT, as pointed out before, but rather to the change of nature of electrochemical processes, that means, the increasing contribution of larger time-constant electrochemical phenomena.…”

Section: Electrochemical Impedance Measurementsmentioning

confidence: 96%

“…1,2 Although being a widely studied phenomenon, the stress corrosion cracking dependence on pH, as well as the chloride threshold necessary to trigger the process, are not completely determined. Some papers have attempted to correlate the type of localized corrosion with pH and Cl -content, 3,4 even delimiting the immunity region for stress corrosion cracking, 4 but these attempts were not sufficient to definitevely clarify this phenomenon. As an example, both the UNS S30100 and the UNS S31000 stainless steels, in spite of the fact that their austenite phase are respectively unstable and stable, have very close empirical correlations (expressed by equations like pH > A x log(Cl -) + B) to describe the regions of pH where the SCC does not take place.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical impedance and current fluctuations analysis during slow strain rate test of a UNS S30400 stainless steel in low pH media

Bastos¹,

Nogueira²,

Gomes³

2005

J. Braz. Chem. Soc.

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Neste trabalho foi investigado o comportamento do aço inoxidável austenítico UNS S30400 em corrosão sob tensão em meios ácidos contendo cloreto à temperatura ambiente. Ensaios de impedância eletroquímica e ruído eletroquímico em corrente foram realizados a diversos níveis de carregamento concomitantemente com o tracionamento a baixa taxa de deformação em pH 0,00 e 1,00 para avaliar a evolução das variáveis eletroquímicas relacionadas com a interface sob deformação. A partir dos resultados obtidos pôde-se constatar que, ao contrário do que ocorre em pH 1,00, o ataque corrosivo a pH 0,00 se caracteriza por intenso trincamento concomitante à instalação progressiva de um processo de corrosão generalizada da superfície metálica. O emprego conjunto das técnicas de impedância e ruído eletroquímico em corrente fornece informações complementares sobre a interdependência da dissolução e do trincamento do aço inoxidável à diferente agressividade representada pelo eletrólito. This paper is aimed at investigating the electrochemical behavior of austenitic stainless steel UNS S30400 under stress corrosion cracking conditions in acidic solutions at room temperature. Electrochemical impedance spectroscopy and electrochemical current noise measurements were performed at different stress levels during slow strain rate tests at pH 0.00 and 1.00 in order to evaluate the influence of mechanical deformation on the evolution of the electrochemical responses of the interface. Results have shown that, differently to what happens at pH 1.00, the corrosive attack at pH 0.00 is characterized by intensive cracking concomitantly to the progressive spreading out of uniform corrosion on the metallic surface. The coupling of both electrochemical impedance and current noise techniques provided complementary information about the interplay between dissolution and cracking of the stainless steel exposed to electrolytes of different aggressiveness.

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Determining Reliability Over Time for Stainless Steels Susceptible to Chloride-Induced Stress Corrosion Cracking

Guzmán-Leong¹,

Cluever²,

Gosselin³

2020

The Minerals, Metals &Amp; Materials Series

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Effect of pH and Chloride Contents on Stress Corrosion Cracking of Austenitic Stainless Steels at Room Temperature

Cited by 10 publications

References 0 publications

Corrosion Mechanisms of High-Mn Twinning-Induced Plasticity (TWIP) Steels: A Critical Review

Corrosion Mechanisms of High-Mn Twinning-Induced Plasticity (TWIP) Steels: A Critical Review

Electrochemical impedance and current fluctuations analysis during slow strain rate test of a UNS S30400 stainless steel in low pH media

Determining Reliability Over Time for Stainless Steels Susceptible to Chloride-Induced Stress Corrosion Cracking

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