鋁片二次陽極處理後電解著色之研究

THE STUDY OF ELECTROLYTIC COLORING AFTER THE SECOND ANODIC TREATMENT OF ALUMINUM SHEET

蔡松霖(Sung-Lin Tsai)

指導教授 ： 施幸祥

大同大學/工程學院/化學工程學系所/碩士(2006年)

摘要

本研究主要目的在討論鋁片在硫酸溶液進行二次陽極處理後，經硫酸銅溶液電解著色，探討一次陽極處理與二次陽極處理著色前後對氧化膜性質的影響。
結果發現，鋁片在進行二次陽極處理後著色，氧化膜之膜厚會較一次者略微增厚，硬度則比一次者下降。著色期間氧化膜的厚度幾乎不會改變，但硬度會隨著著色時間而下降。至於著色後之色差，二次陽極處理後著色的L值都比一次陽極處理後著色低。在著色電壓20V下，二次陽極處理後著色的L值維持在10上下，a和b值都能接近零，可以獲得純黑的效果。經由溶膜試驗與SEM之觀察，二次陽極處理的鋁片有鬆散與多孔洞的結構，適合著色。AFM的觀察得知，二次陽極處理的鋁片有平整的表面及孔洞擴大的現象。以二次陽極處理後著色的鋁片，在可見光波長範圍下，反射率都能比一次者低。

關鍵字

反射率 ； 氧化膜 ； 膜厚 ； 色差 ； 溶膜試驗 ； 鬆散

並列摘要

This study was carried out by means of the method of twice anodic treatment in the sulfuric acid and then electrolytic coloring in cupric sulfate solution. The effects of the first and second anodic treatment on the properties of the anodic films and colored films would be discussed.
For the second anodic treatment, the film thickness of the anodic film is thicker than that from the first anodic treatment. But the hardness is lower than that from the first anodic treatment. Whether the first or second anodic treatment is done or not, the film thickness of the anodic films is almost not changed after the electrolytic coloring, however, the hardness decreases with the coloring times. As for the color difference of colored film, the L value from the second anodic treatment is lower than the first anodic treatment. Under the coloring voltage of 20 V, the L value of colored film from the second anodic treatment is approximately 10 and the a and b values approach to zero and hence the darkest shade of black color can be reached. From the film dissolution test and SEM, the anodic film from the second anodic treatment has the more porous and looser structure, it is suitable for coloring. From the observation of AFM, the anodic film surface from the second anodic treatment is even and the pores are enlarged. At the range of the visible light wavelength, the reflectivities of colored film from the second anodic treatment are all lower than those from the first treatment.

並列關鍵字

anodic film ； film thickness ； color difference ； looser ； reflectivities

參考文獻

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