Corrosion resistance and chemical stability of super-hydrophobic film deposited on magnesium alloy AZ31 by microwave plasma-enhanced chemical vapor deposition

Takahiro Ishizaki, Junko Hieda, Nagahiro Saito, Naobumi Saito, Osamu Takai

Research output: Contribution to journalArticle

201 Citations (Scopus)

Abstract

A super-hydrophobic film was successfully deposited on magnesium alloy AZ31 by the microwave plasma-enhanced chemical vapor deposition (MPECVD) process. The film surface showed a static water contact angle of more than 150°. The hydrophobicity and root mean square roughness of the film surface increased with an increase in deposition time. The anticorrosion resistance of the deposited film was estimated by electrochemical impedance spectroscopy (EIS) measurements. The EIS measurements and appropriate equivalent circuit models revealed that the super-hydrophobic film considerably improved the anticorrosion resistant performance of magnesium alloy AZ31. The anticorrosion mechanism of the super-hydrophobic film was also considered. Moreover, the chemical stability of the super-hydrophobic film in acidic, neutral, and alkaline aqueous solutions was investigated. The super-hydrophobic film showed high chemical stability in acidic and neutral aqueous solutions.

Original languageEnglish
Pages (from-to)7094-7101
Number of pages8
JournalElectrochimica Acta
Volume55
Issue number23
DOIs
Publication statusPublished - 2010 Sep 30

Keywords

  • Corrosion resistance
  • Electrochemical impedance spectroscopy
  • Magnesium alloy
  • Plasma CVD
  • Super-hydrophobic film

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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