装饰用铝合金型材氧化膜制造工艺研究

MANUFACTURING TECHNIQUE FOR DECORATIE OXIDE FILM OF ALUMINUM ALLOY SECTION MATERIAL

铝合金型材在大气中易被腐蚀，阳极氧化膜能提高材料的抗腐蚀性能。讨论了电解液硫酸浓度、溶液温度、氧化时间，电流密度对氧化膜质量的影响。选择硫酸浓度为１５％～２０％，温度为（２０±１）℃，时间为（３０±２）ｍｉｎ，电流密度１～１５Ａ／ｄｍ２的工艺条件，取得了厚度１０～１２μｍ，抗腐强度９级，硬度为３５１Ｈｖ的各种颜色铝合金型材。

Aluminium alloy section material is easy to be corroded in air. However, anodicoxide film can improve its corrosion resistance. This paper discusses the effect of H2SO4 concentration of electrolte, solution temperature, oxidation time and current density on the quality of oxide film. At a H2SO4 concentration of 15%～20%, solution temperature of (20±1) ℃, oxidation time of (30±2) min and current clensity of 1～15 A/dm2, aluminium alloy section material can be obtained, with a thickness of 10～12 μm, corrosion strength of 9, hardness of 351 Hv and different colours.