Study of vanadium-based chemical conversion coating on the corrosion resistance of magnesium alloy

K. H. Yang, M. D. Ger, W. H. Hwu, Y. Sung, Y. C. Liu

Research output: Contribution to journalArticle

130 Citations (Scopus)

Abstract

In this study, magnesium alloy (AZ61) was immersed in vanadium containing bath with various conditions, such as the vanadium concentration, immersion time and bath temperature. The results indicate that increase of both vanadium concentration and immersion time produces a thicker conversion layer. However, when immersion time is too long, it will worsen the corrosion resistance due to the increasing of the crack density. The experimental parameter of bath temperature has no significant effect on corrosion resistance. Our results demonstrated that the better corrosion resistance coating can be obtained when the samples are submitted to an immersion in the conversion bath containing NaVO3 with concentration of 30 g l-1 for 10 min at 80 °C. The presented conversion treatment has its potential to replace the chrome-based conversion coating treatment.

Original languageEnglish
Pages (from-to)480-485
Number of pages6
JournalMaterials Chemistry and Physics
Volume101
Issue number2-3
DOIs
Publication statusPublished - Feb 15 2007
Externally publishedYes

Keywords

  • AZ61
  • Chemical conversion coating
  • Corrosion resistance
  • Magnesium alloy
  • Vanadium

ASJC Scopus subject areas

  • Materials Chemistry

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