https://scholars.lib.ntu.edu.tw/handle/123456789/74489
標題: | 鎂合金之非鉻酸鹽皮膜處理 | 作者: | 林招松 | 關鍵字: | 化成處理;鎂合金;鉻酸鹽化成皮膜;錳酸鹽化成皮膜;conversion coating treatment;magnesium alloys;chromate conversion coating;permanganate conversion coating | 公開日期: | 2003 | 出版社: | 臺北市:國立臺灣大學材料科學與工程學研究所 | 摘要: | 本計畫探討適合鎂合金之非鉻酸鹽化成處理,並以鉻酸鹽為對照組,探討不同化成液所得皮膜結構、皮膜成長機制及其相對抗蝕性的差異。相較於鉻酸鹽化成皮膜,錳酸鹽化成皮膜為多孔性結構,在皮膜/鎂界面的附著性較差,錳酸鹽化成皮膜可以在化成處理中持續增厚,其中溫度效應為影響錳酸鹽化成皮膜成長最主要的因素,且生成之化成皮膜表面顏色可藉由改變化成時間而 加以控制。極化曲線結果顯示,適當的錳酸鹽皮膜處理後的試片,其抗蝕性和鉻酸鹽皮膜相當。 This study investigated the non-chromate conversion coating for magnesium alloys, and compared and contrasted the microstructure, formation mechanisms and corrosion resistance of the various non-chromate conversion coatings and chromate conversion coatings. The permanganate coating exhibited a porous structure and its adhesion to the magnesium substrate was poor than that of chromate conversion coating. Unlike the chromate coating whose thickness had reached a saturated value after 5 min. of immersion, the thickness of the permanganate coating continuously increased with the immersion time. Solution temperature was found to be the primary factor in determining the growth rate of the permanganate coating of which color markedly changed with the immersion time. Finally, the magnesium alloy, after proper permanganate conversion coating, had a corrosion resistance similar to these with chromate conversion coating, as demonstrated in polarization curves. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/12449 | 其他識別: | 912216E002041 | Rights: | 國立臺灣大學材料科學與工程學研究所 |
顯示於: | 材料科學與工程學系 |
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912216E002041.pdf | 348.49 kB | Adobe PDF | 檢視/開啟 |
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