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Coatings 2017, 7(3), 44; doi:10.3390/coatings7030044

High-Temperature Corrosion of AlCrSiN Film in Ar-1%SO2 Gas

1
School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 16419, Korea
2
School of Materials Science & Engineering, Anhui University of Technology, Maanshan 243002, China
3
Department of Advanced Materials Engineering, Chungbuk National University, Cheongju 28644, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Niteen Jadhav and Andrew J. Vreugdenhil
Received: 26 December 2016 / Revised: 7 March 2017 / Accepted: 9 March 2017 / Published: 13 March 2017
(This article belongs to the Special Issue Coatings for Corrosion Mitigation)
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Abstract

AlCrSiN film with a composition of 29.1Al-17.1Cr-2.1Si-51.7N in at. % was deposited on a steel substrate by cathodic arc ion plating at a thickness of 1.8 μm. It consisted of nanocrystalline hcp-AlN and fcc-CrN, where a small amount of Si was dissolved. Corrosion tests were carried out at 800 °C for 5–200 h in Ar-1%SO2 gas. The major corrosion reaction was oxidation owing to the high oxygen affinity of Al and Cr in the film. The formed oxide scale consisted primarily of (Al,Cr)2O3, within which Fe, Si, and S were dissolved. Even after corrosion for 200 h, the thickness of the scale was about 0.7–1.2 μm, indicating that the film had good corrosion resistance in the SO2-containing atmosphere. View Full-Text
Keywords: AlCrSiN film; oxidation; sulfidation; SO2 gas corrosion AlCrSiN film; oxidation; sulfidation; SO2 gas corrosion
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Yadav, P.; Lee, D.B.; Lin, Y.; Zhang, S.; Kwon, S.C. High-Temperature Corrosion of AlCrSiN Film in Ar-1%SO2 Gas. Coatings 2017, 7, 44.

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