晶粒及陽極處理對AA6061鋁合金黑色電解著色膜性質之影響

THE INFLUENCE OF GRAIN SIZE AND ANODIZING ON PROPERTIES OF BLACK COLORED FILM OF AN AA6061 ALUMINUM ALLOY

陳重禎(Chung-Chen Chen)

指導教授 ： 邱六合

大同大學/工程學院/材料工程學系所/碩士(2005年)

摘要

本實驗旨在探討晶粒大小及陽極處理對鋁合金陽極處理膜層及電解著色後光學、腐蝕性質之影響。以熱機處理將原始2±0.5mm晶粒細化為20±3μm晶粒，隨後在硫酸浴中進行直流電陽極處理及在硫酸銅電解液中電解著色成為黑色。結果顯示1.5 A/dm2電流密度陽極處理60分鐘可得到348±18 (HV5g)之硬度，5 A/dm2電流密度陽極處理60分鐘則可得到455±15 (HV5g)。在相同的11±1μm陽極膜層厚度下，1.5 A/dm2電流密度陽極處理可使陽極膜層經電解著色後有較低的可見光反射率以及CIE L值。20±3μm之細晶粒鋁合金板材在1.5 A/dm2及5 A/dm2電流密度或11±1μm及22±2μm膜厚以及著色時間為15及25分鐘皆可獲得較低的可見光反射率以及CIE L值，黑色電解著色效果較2±0.5 mm晶粒鋁合金板材好。鋁合金板材經過電解著色處理後所降低腐蝕電流密度在46%以內，封孔處理則有較明顯的下降約62~78%。

關鍵字

電解著色 ； 腐蝕電流密度 ； 晶粒大小 ； 陽極處理

並列摘要

The effect of grain size on the optical property and corrosion behavior of an anodic oxide film has been studied. Al specimens grain sizes were refined from 2±0.5mm to 20±3μm by thermal heat treatment. Specimens were subsequently anodized in a sulfuric acid solution using pulsed current and black colored in a solution containing cupric salt. The hardness of anodized film anodized at current density 1.5 A/dm2-60mins and 5 A/dm2-7mins were 348±18(HV5g) and 455±15(HV5g). Of the same film thickness (11μm), the anodic oxide film obtained at 1.5 A/dm2 current density showed lower reflectivity and CIE L value than film anodized at 5 A/dm2. The aluminum plates were anodized at current density 1.5 A/dm2 or 5 A/dm2, the obtained film thickness are 11±1μm or 22±2μm and enforce coloring time are 15 or 25minute. Aluminum of 20±3μm grain size showed more benefit on black coloring treatment. The corrosion current density of aluminum sheet was decreased 46% after black coloring. However the anodic oxide film after the sealing treatment has a obvious decreasing effect of corrosion current density about 62~78 %.

並列關鍵字

anodize ； corrosion current density ； electrolytic coloring ； grain size

參考文獻

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