Journal
ELECTROCHIMICA ACTA
Volume 55, Issue 23, Pages 7094-7101Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.06.064
Keywords
Super-hydrophobic film; Plasma CVD; Magnesium alloy; Corrosion resistance; Electrochemical impedance spectroscopy
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Funding
- Iketani Science and Technology Foundation
- Aichi Science & Technology Foundation of the Ministry of Education, Culture, Sports, Science and Technology, Japan
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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 degrees. 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. (C) 2010 Elsevier Ltd. All rights reserved.
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