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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/2264

    Title: 電化學拋光處理、陽極處理中硫酸流速與封孔處理對陽極皮膜品質之影響;The influence of electropolishing,the change of sulfuric acid's flow rate and sealing treatmeat on anodizing treatment.
    Authors: 陳心榜;Sin-Bang Chen
    Contributors: 機械工程研究所
    Keywords: 電化學拋光;色差;Gloss;流速;封孔;Gloss;electropolish;aberration;flow rate;sealing
    Date: 2003-07-09
    Issue Date: 2009-09-21 11:42:17 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 摘要 本研究主要探討三個不同的製程改變對陽極皮膜的色差、光澤與透明度的影響,實驗中採用的材料為商用鋁合金5052 H32。 (1) 陽極處理前施行電化學拋光處理的影響,電化學拋光液為過氯酸與乙醇混和液,藉由改變電壓、處理時間與試片原始粗糙度,來探討電化學拋光對陽極前後試片表面的品質 (2) 改變陽極槽內硫酸流速,陽極處理採用硫酸製程,定電流,電解液為稀硫酸,藉由硫酸的流速,探討流速對陽極皮膜的影響 (3) 改變陽極處理後的封孔方式,在陽極處理後,分別採用4種常用封孔方式並與未封孔做比較,探討陽極皮膜的品質。 實驗採用薄膜測厚儀、分光式測色計、三角度光澤計與SEM作為分析量測工具。實驗結果如下 l 電化學拋光處理,可以有效的將5052試片,拋光成鏡面的品質,且能有效的去除試片表面的油污、氧化物與介在物等,同時,在表面形成一層薄的氧化鋁層,進而影響陽極處理的品質,其最佳處理參數為電壓10V、處理時間120sec、拋光前試片表面原始粗糙度0.16μm。 l 陽極處理槽內的硫酸流速越高,陽極皮膜的表面形態越平整,量測到的L、a、b值與Gloss也越均勻,但同時也會使L值下降、a值與b值分別偏綠與偏黃。 l 適當的封孔方式可以提升陽極皮膜的表面品質,實驗中以蒸氣封孔所得之陽極皮膜透明性最佳,而工業上常使用醋酸鎳則容易使陽極皮膜的a值更偏綠、b值更偏黃、L值降低,因此,醋酸鎳封孔完會得到更偏暗黃色的陽極皮膜。 The aim of present study was to investigate the effects of three different process’s change on the aberration、burnish and transparency of anodizing layer. The material in this experiment was business 5052 H32 aluminum alloy. (1) Add electro-polishing treatment before anodizing treatment,and investigate the change of the aberration、burnish and transparency. The electrolyte using in electro-polishing treatment is the mixing bath with HClO4 and ethanol. By changing the voltage,electrolyting time and the sample’s roughness that was as receive, investigates the influence of electropolishing on the surface quality of samples. (2) Changed the electrolyte’s flow rate in the tank. It was using the sulfate acid process. All experiment conducted by using constant current-density. By changing the sulfate acid’s flow rate,investigated the influence of anodizing layer. (3) Changed the way of sealing .It used four ways to seal the anodizing layer after anodizing treatment, and compare with non- sealing sample. The measure tool are the coating thickness tester,spectrophotometer,SEM and glossmeter. The result is l Electropolishing is powerful to polish the 5052 sample,and can make the sample surface look mirrorlike. Electropolishing also can clean the surface and remove the grease ,oxide and inclusion,and affect the surface of anodizing flim. l If the flow rate of sulfate acid in anodizing tank is more fast, the surface of anodizing film will be more even, and the L,a,b,gloss value will be equable. At the same time higher flow rate also will make the L value lower, the a value more greener,the b value more yellower. l Acceptive sealing way can improve the surface quality of anodizing film The anodizing film use steam sealing process is most diaphanous in the experiment. The anodizing film use nickl-acetate sealing process is easy to make a value more greener, b value more yellower, L value lower. So use nickl acetate sealing process would get more yellower and darker anodizing film.
    Appears in Collections:[機械工程研究所] 博碩士論文

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