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 journalArticle

  • 2 Citations

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.

LanguageEnglish
JournalCorrosion Science
DOIs
StateAccepted/In press - 2016 Dec 8

Fingerprint

Composite films
Magnesium alloys
Oxide films
Corrosion resistance
Coatings
Oxidation
Potentiodynamic polarization
Oxides
Current density
Corrosion
Substrates

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)

Cite this

Corrosion resistance of composite oxide film prepared on Ca-added flame-resistant magnesium alloy AZCa612 by micro-arc oxidation. / Li, Oi Lun; Tsunakawa, Mika; Shimada, Yuta; Nakamura, Kae; Nishinaka, Kazuhito; Ishizaki, Takahiro.

In: Corrosion Science, 08.12.2016.

Research output: Contribution to journalArticle

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AU - Nishinaka,Kazuhito

AU - Ishizaki,Takahiro

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N2 - 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.

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