A comparative study of the tribocorrosion behaviour of low temperature nitrided austenitic and duplex stainless steels in NaCl solution. (November 2020)

• Record Type: Journal Article
• Authors: Haruman, E.; Sun, Y.; Adenan, M.S.
• Is Part Of: Tribology international. Volume 151(2020)
• Publication Date: 2020-11
• Subjects: Stainless steel -- Nitriding -- Tribocorrosion -- Corrosive wear; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2020.106412
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: This work studied and compared the tribocorrosion behaviour of low temperature nitridedaustenitic (316L) and duplex (2205) stainless steels. After gaseous nitriding at 450 °C for10 h, the S-phase layer formed on the duplex stainless steel is thicker and harder than that onthe austenitic stainless steel. The formation of S-phase layers reduces both mechanical wearand chemical wear of stainless steels but the duplex type exhibits better tribocorrosion performance. Wearing through of the S-phase layer during tribocorrosion leads to asignificant drop in open circuit potential, friction instability, and total material loss from the nitrided specimens. The work concludes that low temperature gaseous nitriding is effective in improving the tribocorrosion behaviour of these materials to avoiding catastrophic surface failures. Highlights: Low temperature nitriding is effective in improving tribocorrosion behaviour in 3.5% NaCl solution. The S-phase layers formed by low temperature nitriding can reduce chemical wear and mechanical wear. Nitrided duplex stainless steel performs better than nitrided austenitic stainless steel under tribocorrosion conditions. The S phase layer on duplex stainless steel experiences corrosion-decelerated mechanical wear at anodic potential.