Corrosion behaviour of laser gas nitrided Ti-6Al-4V in HCl solution

R. Sh Razavi, M. Salehi, M. Ramazani, Hau Chung Man

Research output: Journal article publicationJournal articleAcademic researchpeer-review

41 Citations (Scopus)

Abstract

Laser surface nitriding of Ti-6Al-4V alloy was carried out with a Nd:YAG pulsed laser. The microstructure and corrosion behaviour of the nitrided samples were examined, using SEM, XRD, XPS, and anodic polarization tests in 2 M HCl solution. Laser nitriding produced a thin continuous TiN layer followed by TiN dendrites and TiN0.3needles. The laser nitrided specimen exhibited less corrosion current density, passivated more readily and also, maintained a lower current density over the duration of the experiment. This was correlated with the formation of very thin, continuous TiNxOyfilm, which could retard chloride ions ingress into the substrate.
Original languageEnglish
Pages (from-to)2324-2329
Number of pages6
JournalCorrosion Science
Volume51
Issue number10
DOIs
Publication statusPublished - 1 Oct 2009

Keywords

  • A. Titanium
  • B. Polarization
  • B. XPS
  • C. Passive films

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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