Process of corrosion of the prepainted steel sheet

2020年10月13日关作者 powerson metal

Process of corrosion of the prepainted steel sheet

The organic coating on surface of the prepainted steel sheet can prevent the base metal coated with the coating from be-ing quickly corroded. And the coated base metal selected for the prepainted steel sheet also possess corresponding resis-tance to corrosion.

So, the resistance to corrosion of the prepainted steel sheet mainly includes two parts, namely the resistance of the base metal and the resistance to deterioration of the coating film. Under normal circumstances, the process of deterioration often starts from a loss of gloss, and then the chalking and shedding of the membrane. Owing to the decomposition of the resin content, the surface of the coating membrane starts chalking and then shedding.