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在盐酸溶液中用正弦交流电腐蚀铝箔的工艺在工业上广泛用于扩大或粗化铝表面。本文主要探讨高纯度(99.99％)铝的交流腐蚀机制并讨论交流电频率和幅值、添加剂种类和浓度、盐酸浓度和温度等因素的作用规律及影响趋势。 高纯铝在盐酸中被交流腐蚀时,周期地经过小孔腐蚀三阶段:发孔—溶解—再钝化。蚀孔表面生成包含有缺陷的腐蚀膜,主要成分为Al_2O_3,其厚度受试验条件控制。
The process of etching aluminum foil with a sinusoidal alternating current in hydrochloric acid solution is widely used industrially to enlarge or cobble the aluminum surface. In this paper, the mechanism of AC corrosion of high purity (99.99%) aluminum was discussed. The effects of AC frequency and amplitude, additive type and concentration, hydrochloric acid concentration and temperature on the AC corrosion were also discussed. High-purity aluminum is exchanged in hydrochloric acid corrosion, periodically through the small hole corrosion three stages: hair hole - dissolved - and then passivation. Etched hole surface contains defects containing the corrosion film, the main component of Al 2 O 3, its thickness controlled by the test conditions.