Computer simulation of crevice corrosion of stainless steels: Influence of alloying elements and film depassivation

B. Malki; T. Souier; L. Peguet; B. Baroux

doi:10.1149/1.3697576

Computer simulation of crevice corrosion of stainless steels: Influence of alloying elements and film depassivation

B. Malki, T. Souier, L. Peguet, B. Baroux

Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Crevice corrosion kinetics of AISI 430 and AISI 304 stainless steels (SS) are investigated using both electrochemical transients measurements and finite element method calculations. The experimental results lead to a quantitative picture of the well-known corrosion resistance difference between austenic and ferritic SS. A rational explanation of this behavior is provided by the modeling approach. The results lead to the formulation of critical conditions for crevice propagation in terms of dissolution current (I_G) and depassivation pH_d. In particular, the model estimates correctly the evolution of the corroded surface and fairly predicts the better crevice corrosion resistance of the austenitic grade, which is attributed to the slow dissolution rates in active conditions and to low pH_d.

Original language	English
Title of host publication	Critical Factors in Localized Corrosion 7
Pages	39-48
Number of pages	10
Volume	41
Edition	25
DOIs	https://doi.org/10.1149/1.3697576
Publication status	Published - 2012
Event	7th Symposium on Critical Factors in Localized Corrosion - 220th ECS Meeting - Boston, MA, United States Duration: Oct 10 2011 → Oct 13 2011

Other

Other	7th Symposium on Critical Factors in Localized Corrosion - 220th ECS Meeting
Country	United States
City	Boston, MA
Period	10/10/11 → 10/13/11

ASJC Scopus subject areas

Engineering(all)

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10.1149/1.3697576

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Malki, B, Souier, T, Peguet, L & Baroux, B 2012, Computer simulation of crevice corrosion of stainless steels: Influence of alloying elements and film depassivation. in Critical Factors in Localized Corrosion 7. 25 edn, vol. 41, pp. 39-48, 7th Symposium on Critical Factors in Localized Corrosion - 220th ECS Meeting, Boston, MA, United States, 10/10/11. https://doi.org/10.1149/1.3697576

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abstract = "Crevice corrosion kinetics of AISI 430 and AISI 304 stainless steels (SS) are investigated using both electrochemical transients measurements and finite element method calculations. The experimental results lead to a quantitative picture of the well-known corrosion resistance difference between austenic and ferritic SS. A rational explanation of this behavior is provided by the modeling approach. The results lead to the formulation of critical conditions for crevice propagation in terms of dissolution current (IG) and depassivation pHd. In particular, the model estimates correctly the evolution of the corroded surface and fairly predicts the better crevice corrosion resistance of the austenitic grade, which is attributed to the slow dissolution rates in active conditions and to low pHd.",

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AU - Baroux, B.

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N2 - Crevice corrosion kinetics of AISI 430 and AISI 304 stainless steels (SS) are investigated using both electrochemical transients measurements and finite element method calculations. The experimental results lead to a quantitative picture of the well-known corrosion resistance difference between austenic and ferritic SS. A rational explanation of this behavior is provided by the modeling approach. The results lead to the formulation of critical conditions for crevice propagation in terms of dissolution current (IG) and depassivation pHd. In particular, the model estimates correctly the evolution of the corroded surface and fairly predicts the better crevice corrosion resistance of the austenitic grade, which is attributed to the slow dissolution rates in active conditions and to low pHd.

AB - Crevice corrosion kinetics of AISI 430 and AISI 304 stainless steels (SS) are investigated using both electrochemical transients measurements and finite element method calculations. The experimental results lead to a quantitative picture of the well-known corrosion resistance difference between austenic and ferritic SS. A rational explanation of this behavior is provided by the modeling approach. The results lead to the formulation of critical conditions for crevice propagation in terms of dissolution current (IG) and depassivation pHd. In particular, the model estimates correctly the evolution of the corroded surface and fairly predicts the better crevice corrosion resistance of the austenitic grade, which is attributed to the slow dissolution rates in active conditions and to low pHd.

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