Corrosion of chromia-forming and alumina-forming ferritic stainless steels under dual atmosphere exposure conditions
Department
Mechanical Engineering
Document Type
Article
Publication Date
11-1-2021
Abstract
The surface morphology and chemistry of oxide scales formed on select chromia-forming and alumina-forming ferritic steels have been studied after exposure to a dual atmosphere of hydrogen and air. Localized Fe-rich oxide nodules with surface whiskers/platelets form at the onset of corrosion. The initiation and growth of localized nodules and breakdown of passivation are attributed to the presence of hydrogen, inclusion of iron oxide in the passivating scale, and subsequent growth of iron-rich oxide due to the establishment of redox (H2-H2O) atmosphere and modification of oxide defect chemistry.
Journal Title
Journal of the Electrochemical Society
Journal ISSN
00134651
Volume
168
Issue
11
Digital Object Identifier (DOI)
10.1149/1945-7111/ac38f9
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