In view of the narrow allowable temperature range and high energy consumption of conventional anodizing process,triethanolamine and cerous sulfate were selected as additives added to conventional sulfuric acid electrolyte.The anodizing experiment was carried out with decorative alumi-num-copper alloy as the substrate,and the effects of triethanolamine and cerous sulfate used alone or in combination on the upper limit of anodizing temperature and the microstructure,composition,thickness,phase structure and corrosion resistance of anodized films were studied.The results show that triethanolamine or cerous sulfate used alone can increase the upper limit of anodizing temperature to about 30℃and 35℃respectively,and both can improve the compactness of anodized films,increase the thickness and improve the corrosion resistance.However,triethanolamine or cerous sulfate used alone has no effect on the phase structure of anodized film.The combination of triethanolamine and cerous sulfate can increase the upper limit of anodizing temperature to about 40℃,and the anodized film with ideal morphology quality and corrosion resistance can be prepared and completely covered on aluminium-copper alloy substrate under the condition of high electrolyte temperature,so as to realize energy saving and process cost reduction.
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