Research on Hard Oxidation Process and Properties of 8030 Aluminum Alloy at Room Temperature
In this paper,sulfuric acid,tartaric acid and oxalic acid with certain concentration are selected as anodic oxidation electrolyte,and the hard oxidation process of aluminum alloy at room temperature is successfully developed by controlling the ratio of electrolyte and current density.In this process,the qualified hard oxide film can be prepared by controlling the temperature of the electrolyte at 15～20℃.The corrosion resistance of the film is good,and no point corrosion appeared in the neutral salt spray test for 1200h.The weight loss index of the phochromic acid weight loss test is 3.4 mg/dm2.The hardness is high,and the microhardness test result is 489HV,which is close to the hardness of sulfuric acid hard oxide film and much higher than that of ordinary anodic oxide film.
hard at room temperaturecorrosion resistancehardness
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