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 | |
| 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 |
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ASJC Scopus subject areas
- Engineering(all)