鋁材經鉬酸銨及氟化銨預浸置處理後以混酸陽極處理

THE STUDY OF ANODIZATION OF ALUMINUM IN MIXED ACID AFTER PRE-IMMERSING IN AMMONIUM MOLYBDATE AND AMMONIUM FLUORIDE

譚志豪(Chih-Hao Tan)

指導教授 ： 施幸祥

大同大學/工程學院/化學工程學系所/碩士(2004年)

摘要

本研究的主要目的針對鋁A1100先以鉬酸銨和氟化銨混合溶液浸置, 再於混酸溶液中陽極處理。探討預浸置及不同陽極處理條件對鋁陽極氧化皮膜性質的影響。
由實驗結果得知, 經過預浸置後所得的陽極氧化膜在SEM圖中表面結構緊密且分佈均勻；由EDS分析知陽極氧化膜的結構中會含有鉬原子；此外在溶膜試驗也發現陽極氧化膜其膜密度較大。因此綜合以上結果之表現無論在膜硬度、膜厚度上以及耐腐蝕性質上, 經過預先浸置所得的陽極氧化膜都較佳。
結果可得最佳膜硬度為667Hv; 最佳膜厚為107μm, 比以往實驗皆有提升。

關鍵字

脈動電流 ； 鋁材 ； 陽極處裡 ； 鉬酸銨

並列摘要

The main purpose in this research is to study the effect of pre-immersing process in a solution of ammonium molybdate then anodized in a mixed acid solution on the anodic films. Also, some difference of properties of anodic films obtained from different anodizing conditions would be investigated.
With the pre-immersing process, the SEM photos show that the anodic film is more compact and uniform; the EDS analytic charts show that the molybdenum element is found in the anodic film; and the film dissolution tests show that the anodic film has higher film density. These results show that the films obtained from pre-immersing process have better performance on the film properties such as film hardness, film thickness and corrosion resistance.
The maximum film hardness of the anodic films is 667Hv and the maximum film thickness is 107μm.

並列關鍵字

aluminum ； ammonium molybdate ； anodization ； pulsed current

參考文獻

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