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阳极化铝(Anodizing Aluminum)利用各种电解质氧化铝面,以使其表面坚硬,易于着色,同时并增强其抗蚀力。(1)硫酸法(美国制铝公司专利):这种方法普通多用15—25%的硫酸溶液(以重量计),硫酸与铝作用而生成一层氧化铝薄膜,因所用硫酸浓度不同,可以得到各种特性的氧化铝外皮。如用15—18%的硫酸可得化合性较强的外皮,假如需要较硬的外皮,则可用7%的硫酸,如用25%的硫酸,则其外皮较软,多孔而有吸收性。a.硫酸法的设备:(a)以铅衬里的电镀槽,附有空气搅拌器及控制温度器,或以橡胶衬里的电镀槽用铅作阴极;(b)排气通风管;(c)直流发电机或整流器(Rectifier)。b.工作条件:
Anodizing Aluminum utilizes a variety of electrolyte aluminum flakes to make its surface hard and easy to color while enhancing its etch resistance. (1) sulfuric acid method (the United States aluminum company patent): This method commonly used 15-25% sulfuric acid solution (by weight), sulfuric acid and aluminum to form a layer of aluminum oxide film, the concentration of sulfuric acid used can be different Get all kinds of features of aluminum oxide skin. Such as the use of 15-18% sulfuric acid can be more strong cohesive skin, if the need for a hard skin, you can use 7% sulfuric acid, such as 25% sulfuric acid, the rind is softer, porous and absorbent. a. Sulfuric acid equipment: (a) lead-lined plating tank with air agitator and temperature control or rubber-lined plating tank with lead as cathode; (b) venting vent; (c) DC generator or rectifier (Rectifier). b. Working conditions: