(哈爾濱工業(yè)大學(xué) 應(yīng)用化學(xué)系， 哈爾濱 150001)
摘 要: 通過電解刻蝕在鋁合金表面形成圖紋，然后再陽極氧化、電解著色，可使鋁合金具有多彩的裝飾性。電解刻蝕液由形成阻擋層的物質(zhì)和具有溶解(刻蝕)作用的物質(zhì)組成。電解刻蝕圖紋的形成與電極表面析出的氫氣有直接關(guān)系，氫氣泡尺寸越大，在電極表面滯留的時間越長，則圖紋的刻痕越深、越寬。圖紋處氧化膜的孔徑、孔密度和厚度較大，電解著色時可沉積較大量的金屬，呈現(xiàn)出較深的顏色，從而使鋁合金表面具有對比鮮明的彩色圖案外觀。
關(guān)鍵字: 鋁合金；電解刻蝕；圖紋化；電解機制
（Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, P.R.China）
Abstract:Aluminum alloy can be colorfully decorated by electrolytic etched pattern graining following anodic oxidization and electrolytic coloring. Pattern graining formed during electrolytic etching is affected by produced hydrogen in electrolytic process. While the size of hydrogen bubbles increased , ditches becomes deeper and wider. XRD and XPS analysis show that oxide film in the type of α-Al2O3 and γ-Al2O3 is formed on the ditches in pattern graining surface. After further anodic oxidization, pore density and size of porous anodic oxide film on the ditches are larger than other surface, which makes it possible to deposit more metal during electrolytic coloring and makes aluminum alloy show a colorful appearance.
Key words: aluminum alloys; electrolytic etching; pattern graining; electrolytic mechanism
