The surface painting process for motors has always followed the "tropical electrical product painting" method (i.e., two coats of epoxy red iron oxide primer followed by two coats of amino alkyd baking varnish). The first coat of red iron oxide primer was not baked because machining would follow, and there was a significant time gap between the first and second coats for drying. Therefore, the first primer was not baked. The second primer was applied only after installation and testing were completed, and both the second primer and the subsequent two amino alkyd baking varnishes were baked. This process was consistently followed without any problems.
With the development of industrial technology, manual methods alone can no longer meet market demands. Spray painting has evolved from manual to automated processes, with increasingly higher levels of automation. Consequently, spray painting production lines are being used more and more widely, penetrating various sectors of the national economy. In my country, especially since the reform and opening up, spray painting equipment has achieved significant development.
