Document Type
Article
Publication Date
2002
DOI
10.1520/STP1421-EB
Publication Title
Outdoor Atmospheric Corrosion
Pages
149-156
Abstract
The effect of chromium ion (Cr3+) and sulfate ion (SO42-) on the structure of the rust layer formed by thin electrolyte-film corrosion of low-alloy steels has been examined. By using X-ray diffraction spectroscopy, it was found that coexistence of Cr3+ and SO42- in the electrolyte film covering the steel surface quickly forms the Cr-goethite (α-(Fe 1-X, CrX)OOH) layer which has been known as the final protective rust layer. Scanning vibrating electrode measurements showed that the rust layer formed under the electrolyte film containing Cr3+ and SO42- possesses higher protective ability against the aggressive chloride environment. Mössbauer spectroscopy revealed that most of the Cr-goethite formed by corrosion of the Fe-5at%Cr alloy under thin electrolyte-film containing SO42- was the superparamagnetic ultra-fine Cr-goethite. It can be said that the Cr-goethites possess the high protective ability against aggressive corrosives.
Rights
ASTM grants authors the right to post the final published version of the work in a company or university repository with appropriate reference to the ASTM journal 12 months after ASTM publication.
Copyright © 2002 by ASTM International.
Original Publication Citation
Yamashita, M., Uchida, H., & Cook, D. C. (2002). Effect of Cr 3+ and SO4 2- on the structure of rust layer formed on steels by atmospheric corrosion. In Outdoor Atmospheric Corrosion (pp. 149-156). ASTM International. https://doi.org/10.1520/STP1421-EB
Repository Citation
Yamashita, Masato; Uchida,, Hitoshi; and Cook, Desmond C. ., "Effect of Cr3+ and SO42- on the Structure of Rust Layer Formed on Steels by Atmospheric Corrosion" (2002). Physics Faculty Publications. 986.
https://digitalcommons.odu.edu/physics_fac_pubs/986