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铝及其合金具有质轻坚韧、导电性、导热性及延展性能优良的特点,因此,它在国防、汽车、建筑、机械、电气、化工等各个领域里的用途十分广泛。在铝制品中,通常是采用氧化着色、电镀、喷漆等方法来加以保护的,但都要进行涂前处理,由于铝的材质不同其处理方法亦不同。现介绍2种工艺: HNO3(工业纯) 75％ H_2SO_4(工业纯) 100％温度常温时间 4～10 工件浸泡在两种强酸混合液中,立即产生黄色浓
Aluminum and its alloys are characterized by light weight, toughness, electrical conductivity, thermal conductivity and ductility. Therefore, aluminum and its alloys are widely used in various fields such as defense, automobile, construction, machinery, electrical and chemical industries. In aluminum products, usually by oxidation coloring, plating, painting and other methods to be protected, but should be pre-coating treatment, due to the different materials of aluminum its processing method is also different. Now introduced two kinds of technology: HNO3 (industrial pure) 75% H_2SO_4 (industrial pure) 100% temperature room temperature time 4 ~ 10 Work piece soaked in two strong acid mixture, immediately produce yellow thick