| Title |
High-temperature Corrosion of AlCrTiSiN Film in Ar-1%SO2 Gas |
| Authors |
(Poonam Yadav); (Sik Chol Kwon); (Yue Lin); (Shihong Zhang); (Dong Bok Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2017.55.4.222 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
thin films; vapor deposition; corrosion property; transmission electron microscopy (TEM); AlCrTiSiN |
| Abstract |
An AlCrTiSiN film composed of 31Al-15Cr-1.7Ti-0.5Si-51.8N (at%) was deposited on a steel substrate by arc ion plating to a thickness of 1 μm. It consisted of nano crystalline hcp-AlN and fcc-CrN. Its corrosion behavior in Ar-1%SO2 gas at 800 ℃ for 5-50 h was studied. The resulting scales consisted primarily of Al2O3 and Cr2O3, which effectively suppressed the corrosion. No sulfides formed, because Al and Cr oxidized competitively from the surface. The film was primarily corroded by the inward diffusion of oxygen and a much smaller amount of sulfur. (Received July 26, 2016; Accepted October 25, 2016) |