電解拋光對鋁材陽極處理後再電解著色之研究

本研究為探討在前處理步驟中加入“電解拋光”對陽極氧化後電解著色皮膜物性的影響，期望利用電解拋光可以獲得更好的氧化鋁膜，以利於進行電解著色。　　實驗結果發現，使用有拋光之鋁材做陽極處理，能使孔洞更多且形狀均一，排列更加整齊。而著色後，△E*與反射率都比使用未拋光鋁片者低上許多。經腐蝕試驗證實，其抗腐蝕性的優劣依序為：拋光鋁片<未拋光鋁片<拋光鋁片之陽極膜<未拋光鋁片之陽極膜<未拋光鋁片之著色膜＜拋光鋁片之著色膜。使用電解拋光10V時間30分鐘鋁材，在電流密度2A/dm2下陽極處理後再使用交流電壓20V電解著色30分鐘可得到最低的△E*值、反射率，改善黑色氧化鋁膜性質。

關鍵字

電解拋光；陽極處理；電解著色

並列摘要

The effect of the step of electropolishing before anodic oxidation on the properties of aluminum oxide film were investigated in this study. It is expected that the addition of “electropolishing” before anodizing step can obtain a better anodic film and colored film. The experimental results show that the electropolished aluminum sheet increase the number of pores of the anodic film. And make the pores more uniform and more orderly. If electropolishing is used, the △E* value and reflectivity of the colored film are lower than without electropolishing. From corrosion test, the corrosion resistance is in the following order : (Aluminum sheet after EP) < (aluminum sheet with no EP) < (anodic film with EP) < (anodic film with no EP) < (colored film with no EP) < (colored film with EP). The optimal operating conditions for obtaining the blackest colored film are: electropolishing voltage 10Vdc, electropolishing time 30 min, anodizing current density 2A/dm2, electrolytic coloring voltage 20Vac and electrolytic coloring time 30 minutes, the lower △E value, corrosion rate and

並列關鍵字

electropolishing ； anodizing ； electro coloring

參考文獻

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[16]Su. Yongqing, Metal Finishing, 12, 21, (2000).

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電解拋光對鋁材陽極處理後再電解著色之研究

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