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- Title
NaCl-induced accelerated oxidation of 304 stainless steel and Fe-Mn-Al alloy at 900°C.
- Authors
Jyh-Wei Lee; Chaur-Jeng Wang; Jenq-Gong Duh
- Abstract
The high-temperature corrosion behavior of cold-rolled and annealed 304 stainless steel (304SS) and Fe-29Mn-8Al-2.5Si-2Cr-0.74C alloy coated with 0.002 g cm-2 NaCl initially were studied at 900°C in air. The corrosion kinetics of the two alloys follow the parabolic rate law. The initial NaCl coating accelerates oxidation of these alloys by oxychlorination and chlorination/oxidation cyclic reactions, and catalytic actions of chloride or chlorine are thought to be the principal causes. A bulky, layered scale as well as some intergranular attack is noted on the annealed 304SS, and intergranular attack distributes over the alloy substrate of the cold-rolled 304SS during a 144 h exposure. With the formation of a compact Al2O3 scale to decrease further chlorine attack, the corrosion resistance of Fe-Mn-Al alloy is superior to that of 304SS in this study.
- Subjects
STAINLESS steel; ALLOYS; CHROME steel; MICROALLOYING
- Publication
Journal of Materials Science, 2003, Vol 38, Issue 17, p3619
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1023/A:1025677331351