Corrosion resistance of composite oxide film prepared on Ca-added flame-resistant magnesium alloy AZCa612 by micro-arc oxidation

Oi Lun Li, Mika Tsunakawa, Yuta Shimada, Kae Nakamura, Kazuhito Nishinaka, Takahiro Ishizaki

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A composite oxide film was prepared on a flame-resistant magnesium alloy AZCa612 by micro-arc oxidation (MAO). The thickness of the film was approximately 30 μm, where the film was composed of mainly of MgO and Mg-Mn-Al oxide. Potentiodynamic polarization curve measurements demonstrated that the corrosion current density of the composite oxide film coated AZCa612 decreased by 6 orders of magnitude compared to bare substrate. Immersion tests in 5 wt.% NaCl solution after 42 day indicated the coating phase did not change significantly, which proved that the MAO coating have superior corrosion resistance in 5 wt.% NaCl aqueous solution.

Original languageEnglish
Pages (from-to)99-105
Number of pages7
JournalCorrosion Science
Volume125
DOIs
Publication statusPublished - 2017 Aug 15

Keywords

  • Ca-added Magnesium alloy
  • Composite oxide film
  • Corrosion resistance
  • Micro-arc oxidation

ASJC Scopus subject areas

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

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