铝合金表面镀Zn和镀Sn工艺研究

Because of oxidizing in the air or water immediately, and the oxidation can damage the adhesion of the coating, so it is difficult to plate on the surface of aluminum alloy. In order to avoid negative effect, we must take processes to change the aluminum alloy surface characteristic. So that a good adhesion metal coating which can prevent oxidize is formed on the surface of aluminum alloy. This paper Study of Electro less zinc、stannum on the surface of aluminum alloy, The effects of the composition of Electro less liquid and technical parameters on Zn and Sn layer were analyzed, and determine the optimum composition and parameters. Introduce the method how to measure adhesion on the surface of aluminum alloy. The effect of zinc dipping solution temperature and dipping time on the coating properties was discussed. It proves by the experiment that the coating obtained by this process can meet the testing of temperature shock at 300℃ and possess nice performance of adhesion.