| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5448524 | Materials Chemistry and Physics | 2017 | 7 Pages |
Abstract
This investigation studies the microstructures of FeCoNi and CrFeCoNi alloys, and their polarization behaviors in 1Â M deaerated H2SO4 and NaCl solutions. The results revealed that both FeCoNi and CrFeCoNi alloys had an FCC granular structure, and their lattice constants were approximately 0.357Â nm in as-cast and as-annealed states. However, many HCP precipitates were observed in the matrix of CrFeCoNi alloy in both as-cast and as-annealed states. The corrosion resistance of FeCoNi alloy in 1Â M H2SO4 solution was better than that of CrFeCoNi alloy. The corrosion resistances of both FeCoNi and CrFeCoNi alloys in 1Â M H2SO4 solution were better than that of 304 stainless steel. The corrosion resistance of FeCoNi alloy in 1Â M NaCl solution was better than that of CrFeCoNi alloy. The activation energies of FeCoNi and CrFeCoNi alloys were calculated using the Arrhenius equation; in 1Â M H2SO4 solution, they were 28.5 and 20.8Â kJ/mol, respectively; and in 1Â M NaCl solution, they were 24.6 and 89.1Â kJ/mol, respectively.
Related Topics
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Authors
Chun-Huei Tsau, Si-Xuan Lin, Chien-Hao Fang,