Corrosion protection offered by Cr2O3 type protective oxides formed on various iron alloys has been studied in the presence of molten carbonate salt deposits. Oxide mophology and surface topography indicate that the oxides formed on low chromium steels remain prone to cracking whereas oxides formed on high chromium steels and steels modified by rare earth additions form adherent corrosion products. Crack free and adherent oxides act as an electrolyte barrier against the inner Cr2O3 layer dissolution in the salt and provide long-term protection of the substrate.

Subject
Iron oxide, Metal surfaces, Nickel based alloys, Oxide formation, Chromium, Iron, Metal oxides, Oxide scales, Oxide surfaces, Interfaces, Nickel, Alloys, Electrolytes
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1986
Association for Materials Protection and Performance (AMPP)
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