Some technical innovations inspired from practice Part Ⅴ——Removal of copper impurity from acidic bright tin plating bath;

Studies on the antioxidation of rare earth catalyst in acid tin plating bath;

According to the example of current transformer manufacturing in a factory,it is proved that the tin plating technology can replace the conventional tinning in electroplate process for transformer components.

To establish the physics model of conductivity property in copper-clad and tinning copper-clad steel wire,give the way of calculating the basic parameter of them through design of plating technology and extract plating machine,meanwhile being checked by a set of test data,it shows that theory calculation results consist well with test results.