Effect of the passive film on the crevice corrosion of stainless steels experimental and modeling approaches

T. Souier; G. Berthomé; B. Malki; B. Baroux

doi:10.1149/1.3229981

Effect of the passive film on the crevice corrosion of stainless steels experimental and modeling approaches

T. Souier^*, G. Berthomé, B. Malki, B. Baroux

^*Corresponding author for this work

Physics

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

2 Citations (Scopus)

Abstract

We investigate the crevice corrosion resistance of bright annealed (BA) or pickled (2B) AISI 430 type industrial stainless steel sheets. An artificial crevice is electrochemically coupled to a crevice free specimen through a low impedance ammeter measuring the crevice corrosion current at rest potential. After exposure the specimen show a corroded zone around the crevice bottom and a remaining passive zone at the crevice mouth. The active area and the corrosion current are much smaller for BA than for 2B but the average crevice current density does not depend on the surface condition. Modeling ionic concentrations and flows in the crevice allows determining the transition pH between active and passive zones, giving respectively 2.6 and 2.8 for BA and 2B. It fairly accounts for the better corrosion resistance of BA surface, as observed in practice. This coupled experimental and modeling approach provides a powerful tool for further crevice corrosion investigation.

Original language	English
Title of host publication	ECS Transactions - Critical Factors in Localized Corrosion 6, in Honor of Professor Shibata - 214th ECS Meeting
Pages	321-330
Number of pages	10
Volume	16
Edition	52
DOIs	https://doi.org/10.1149/1.3229981
Publication status	Published - 2008
Event	Critical Factors in Localized Corrosion 6, in Honor of Professor Shibata - 214th ECS Meeting - Honolulu, HI, United States Duration: Oct 12 2008 → Oct 17 2008

Other

Other	Critical Factors in Localized Corrosion 6, in Honor of Professor Shibata - 214th ECS Meeting
Country	United States
City	Honolulu, HI
Period	10/12/08 → 10/17/08

ASJC Scopus subject areas

Engineering(all)

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10.1149/1.3229981

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Effect of the passive film on the crevice corrosion of stainless steels experimental and modeling approaches. / Souier, T.; Berthomé, G.; Malki, B.; Baroux, B.

ECS Transactions - Critical Factors in Localized Corrosion 6, in Honor of Professor Shibata - 214th ECS Meeting. Vol. 16 52. ed. 2008. p. 321-330.

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

Souier, T, Berthomé, G, Malki, B & Baroux, B 2008, Effect of the passive film on the crevice corrosion of stainless steels experimental and modeling approaches. in ECS Transactions - Critical Factors in Localized Corrosion 6, in Honor of Professor Shibata - 214th ECS Meeting. 52 edn, vol. 16, pp. 321-330, Critical Factors in Localized Corrosion 6, in Honor of Professor Shibata - 214th ECS Meeting, Honolulu, HI, United States, 10/12/08. https://doi.org/10.1149/1.3229981

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abstract = "We investigate the crevice corrosion resistance of bright annealed (BA) or pickled (2B) AISI 430 type industrial stainless steel sheets. An artificial crevice is electrochemically coupled to a crevice free specimen through a low impedance ammeter measuring the crevice corrosion current at rest potential. After exposure the specimen show a corroded zone around the crevice bottom and a remaining passive zone at the crevice mouth. The active area and the corrosion current are much smaller for BA than for 2B but the average crevice current density does not depend on the surface condition. Modeling ionic concentrations and flows in the crevice allows determining the transition pH between active and passive zones, giving respectively 2.6 and 2.8 for BA and 2B. It fairly accounts for the better corrosion resistance of BA surface, as observed in practice. This coupled experimental and modeling approach provides a powerful tool for further crevice corrosion investigation.",

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