PEO coatings obtained on an Mg-Mn type alloy under unipolar and bipolar modes in silicate-containing electrolytes

Research output: Contribution to journalArticlepeer-review

  • External authors:
  • S. V. Gnedenkov
  • O. A. Khrisanfova
  • A. G. Zavidnaya
  • S. L. Sinebryukhov
  • V. S. Egorkin
  • M. V. Nistratova

Abstract

Protective surface layers with high corrosion resistance (Rp = 3.3·105 ohm cm2) and significant microhardness (H = 4.8 GPa), as compared to the substrate material, were obtained on MA8 magnesium alloy by bipolar Plasma Electrolytic Oxidation (PEO) in a silicate-fluoride electrolyte. The phase and elemental composition and morphology of the coatings were investigated. It was found that the application of the bipolar PEO mode enables one to synthesise on the alloy's surface a high-temperature phase of magnesium silicate, forsterite (Mg2SiO4) having good anticorrosion and mechanical properties.

Bibliographical metadata

Original languageEnglish
Pages (from-to)2316-2322
Number of pages7
JournalSurface and Coatings Technology
Volume204
Issue number14
DOIs
Publication statusPublished - 15 Apr 2010