Effect of Alloy Composition and Exposure Conditions on the Selective Oxidation Behavior of Ferritic Fe–Cr and Fe–Cr–X Alloys

• Published in: Oxidation of metals Vol. 74; no. 5-6; pp. 319 - 340
• Main Authors: Meier, Gerald H., Jung, Keeyoung, Mu, Nan, Yanar, Nazik M., Pettit, Frederick S., Pirón Abellán, J., Olszewski, Tomasz, Nieto Hierro, L., Quadakkers, Willem J., Holcomb, Gordon R.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-12-2010; Springer
• Subjects: Alloy steels; Alloying effects; alloys-Ferritic; Applied sciences; Chemistry and Materials Science; Chromium; combustion-Fe–Cr; Corrosion; Corrosion and Coatings; Corrosion environments; Exact sciences and technology; Ferritic stainless steels; Ferrous alloys; Inorganic Chemistry; Intermetallic compounds; Materials Science; Mathematical models; Metallic Materials; Metals. Metallurgy; Original Paper; Oxidation; Oxy-fuel; Steels; steels-Chromia-Water; Tribology; vapor-Hydrogen-Carbon dioxide; Ferritic steels; Fe–Cr alloys; Hydrogen; Chromia; Carbon dioxide; Water vapor; Oxy-fuel combustion; Corrosion; Chromium alloy; Ferritic steel; Combustion; Oxidation; Fe-Cr alloys
• ISSN: 0030-770X; 1573-4889
• DOI: 10.1007/s11085-010-9215-5

Selective oxidation behavior of ferritic martensitic Fe–Cr base alloys, exposed in various atmospheres containing combinations of O
2
, CO
2
, and H
2
O, were studied at various temperatures relevant to oxy-fuel combustion. This paper begins with a discussion of the required Cr content to form a continuous external chromia scale on a simple binary Fe–Cr alloy exposed in oxygen or air based on experiments and calculations using the classic Wagner model. Then, the effects of the exposure environment and Cr content on the selective oxidation of Fe–Cr alloys are evaluated. Finally, the effects produced by alloying additions of Si, commonly present in various groups of commercially available ferritic steels, are described. The discussion compares the oxide scale formation on simple binary and ternary Fe–Cr base model alloys with that on several commercially available ferritic steels.