利用微弧氧化技術在鎂合金表面製備黑色氧化膜之研究

The technology of micro-arc oxidation black coating on AZ91D magnesium alloys

周偉萍(Wei-Ping Jhou)

指導教授 ： 楊木榮

大同大學/工程學院/材料工程學系所/碩士(2012年)

摘要

目前鎂合金表面著色膜層在使用性能方面存在著一些缺陷，如膜層易脫落、耐磨耐蝕性低、顏色不均勻、在光照條件下易褪色等。這在很大程度上限制了鎂合金的應用。透過對AZ91D鎂合金微弧氧化黑色陶瓷膜處理的試驗研究，製備出顏色均勻、表面光滑、與基材結合緊密、具有良好耐蝕性的黑色陶瓷膜。微弧氧化為一種新穎的電化學表面處理技術，適合用來處理鋁、鎂、鈦等輕金屬合金。藉著在電解液中的電弧放電所產生的表面電漿及短暫高溫，對基材表面進行電漿氧化及高溫溶融，使得所形成的膜層具備極高的硬度與抗蝕性。為了利用微弧氧化技術染黑鎂合金AZ91D，實驗中使用含有硫酸銅的矽酸鹽電解液及不同濃度高鐵酸鉀對於不同微弧氧化處理時間去討論膜層的特性並且使用XPS及分光色差儀去做檢驗。

關鍵字

微弧氧化 ； 鎂合金 ； 染黑

並列摘要

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.

並列關鍵字

Micro-arc oxidation ； magnesium alloy ； blacken

參考文獻

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