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Pickling-activating solution for pre-treatment of aluminium-steel composites before electroless tin plating
Pickling-activating solution for pre-treatment of aluminium-steel composites before electroless tin plating
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机译:化学镀锡前用于铝钢复合材料预处理的酸洗活化液
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摘要
The invention relates to an aqueous preparation for the pickling and activation of aluminum-steel composites prior to electroless dip tinning. Specifically, the invention provides pickling/activation solutions for the pretreatment of aluminum-steel composites prior to dip tinning which comprise sulfuric acid, hexafluorosilicic acid, at least one wetting agent, at least one transition metal cation and nitrate and/or nitrite ions.
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