Improved corrosion resistance of stainless steel 316L by Ti ion implantation

Kai Feng; Xun Cai; Zhuguo Li; Paul K. Chu

doi:10.1016/j.matlet.2011.11.014

Improved corrosion resistance of stainless steel 316L by Ti ion implantation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

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Author(s)

Kai Feng
Xun Cai
Zhuguo Li
Paul K. Chu

Detail(s)

Original language	English
Pages (from-to)	450-452
Journal / Publication	Materials Letters
Volume	68
Publication status	Published - 1 Feb 2012

Link(s)

DOI	DOI https://doi.org/10.1016/j.matlet.2011.11.014 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-84555205608&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(c7747b38-fabb-47e2-ac41-172b4e1bab1e).html

Abstract

The effects of titanium ion implantation on the surface chemical composition, roughness, and microstructure, as well as corrosion mechanism of 316L stainless steel in acid solution are investigated. The bare SS316L has a polycrystalline structure containing second-phase inclusions. These defects are prone to pitting corrosion and intergranular corrosion as observed by SEM. After Ti ion implantation, the outer surface is completely amorphized and homogenized and the region underneath is partly disordered. Consequently, localized corrosion is avoided and the sample undergoes general corrosion. With increasing ion implantation voltages, the surface roughness increases and the corrosion resistance decreases due to more extensive radiation damage as result of energetic ion bombardment. © 2011 Elsevier B.V. All rights reserved.