Surface corrosion enhancement of passive films on NiTi shape memory alloy in different solutions

Lv Jinlong, Liang Tongxiang, Wang Chen, Dong Limin

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The corrosion behaviors of NiTi shape memory alloy in NaCl solution, H2SO4 solution and borate buffer solution were investigated. It was found that TiO2 in passive film improved the corrosion resistance of NiTi shape memory. However, low corrosion resistance of passive film was observed in low pH value acidic solution due to TiO2 dissolution. Moreover, the corrosion resistance of NiTi shape memory alloy decreased with the increasing of passivated potential in the three solutions. The donor density in passive film increased with the increasing of passivated potential. Different solutions affect the semiconductor characteristics of the passive film. The reducing in the corrosion resistance was attributed to the more donor concentrations in passive film and thinner thickness of the passive film.

Original languageEnglish
Pages (from-to)192-197
Number of pages6
JournalMaterials Science and Engineering C
Volume63
DOIs
Publication statusPublished - 2016 Jun 1

Keywords

  • Corrosion resistance
  • Electrochemical properties
  • Passive film
  • Surface

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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