Chemical tinning liquid, preparation method thereof and chemical tinning method
A technology of chemical tin plating and tin salt, applied in the field of chemical plating, can solve problems such as poor stability of chemical tin plating solution, achieve high compactness, ensure long-term stability, and solve the effects of poor stability
Active Publication Date: 2015-07-01
BYD CO LTD
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The invention provides a chemical tinning liquid and a preparation method thereof. The chemical tinning liquid contains tin salt, a complexing agent, a reducing agent and an accelerant, wherein the reducing agent is titanium dichloride; the accelerant contains sulfoacid accelerant; the sulfoacid accelerant is selected from at least one of A, B and C, wherein A is dedecylseleno sulfonate B is a mixture of dodecyl sulfonate and seleno sulfonate and C is a mixture of dodecyl sulfonate and seleno sulfate. The invention also provides a method for chemical tinning by using the chemical tinning liquid. According to the invention, the sulfoacid accelerant is added into the chemical tinning liquid using the titanium dichloride as the reducing agent, so that the activity and the stability of the chemical tinning liquid are effectively improved, the long-term stability of the tinning liquid is ensured and the compactness and the smoothness of a tin coating are improved.
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