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URN etd-0724112-155925 Statistics This thesis had been viewed 3583 times. Download 5085 times. Author Wei-Ping Jhou Author's Email Address No Public. Department Materials Engineering Year 2011 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 95 Title The technology of micro-arc oxidation black coating on AZ91D magnesium alloys Keyword blacken magnesium alloy Micro-arc oxidation Micro-arc oxidation magnesium alloy blacken Abstract The anodized oxide film of magnesium alloy has many defects(poor bond strength, low wear and corrosion resistance, easy fading , uneven color, etc) in traditional surface coloring technology. These defects have largely limited the applications of magnesium alloy. In this paper, black ceramic film with uniform color, smooth surface, compact structure and excellent corrosion on AZ91D alloys was successfully obtained by micro-arc oxidation.
Micro-arc oxidation (MAO) is a new electrochemical surface treatment technology, suitable for treating the aluminum, magnesium and titanium and other light metal alloys. In electrolyte by the arc discharge plasma generated of the substrate oxidation and high temperature melting, the film were formed with high hardness and corrosion resistance. In order to blacken the magnesium alloy AZ91D under plasma electrolytic oxidation (MAO) technology in silicate electrolyte containing copper sulfate and individual concentrations of K2FeO4, the characteristics of MAO coatings formed at different treatment time were investigated and dectection by XRD、 SEM 、XPSand color analysis instrument.
Advisor Committee Mu-Rong Yang - advisor
Chia-Jung, HU - co-chair
Jeou-log Lee - co-chair
Files Date of Defense 2012-06-02 Date of Submission 2012-07-24