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Method of surface treating aluminium alloy bass body of heat exchanger and heat exchanger produced by the method
Method of surface treating aluminium alloy bass body of heat exchanger and heat exchanger produced by the method
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机译:热交换器的铝合金低音箱体的表面处理方法及用该方法生产的热交换器
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摘要
A method of surface treating an aluminum alloy base body of an heat exchanger which method enables an etching procedure to be carried out uniformly and quickly and a corrosion-resistant chemical conversion coating to be formed, is effected by pretreating the Al heat exchanger base body with an aqueous pre-treating liquid having a pH of 9.0 or less, etching the pretreated base body with an aqueous alkaline solution having a pH of 9.0 or more, and then subjecting the etched base body to a chemical conversion treatment or a hydrophilicity-enhancing treatment.
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