Corrosion behaviour of triode plasma diffusion treated and PVD TiN-coated Ti-6Al-4V in acidified aqueous chloride environments

A. Scerri, J. Buhagiar, S. Banfield, J. C. Avelar-Batista Wilson, J. Housden, A. Leyland, A. Matthews, G. Cassar

Research output: Contribution to journalArticlepeer-review

Abstract

The corrosion resistance of triode plasma-nitrided and oxynitrided Ti-6Al-4V was investigated in a hydrochloric acid solution using potentiodynamic polarisation, cyclic voltammetry, and immersion testing at OCP. The untreated and the PVD TiN-coated alloy were used as benchmarks. When compared to the untreated alloy and a PVD-TiN coating, the diffusion treated alloys proved to be more durable due to the presence of a Ti2N compound layer. The corrosion barrier properties of the nitrided alloy depend on both thickness and integrity of the nitride compound layer; the thicker the layer, the better the performance in these tests.

Original languageEnglish
Pages (from-to)185-193
Number of pages9
JournalSurface and Coatings Technology
Volume280
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • Cyclic voltammetry
  • Potentiodynamic polarisation
  • Titanium
  • Titanium nitride
  • Triode plasma nitriding/oxynitriding

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