Investigations on Corrosion Performance of Galvanized 22MnB5 for Hot Press Hardening under Salt Spray Test

摘要

The press hardening steel demands corrosion resistance for automotive parts so that the different metallic coating has been developed. This paper reports on the results of corrosion resistance evaluated by salt spray test. The analyses of mass loss, cross sectional image and maximum pitting depth were carried out. It was found that the corrosion resistance of Zn coated PHS was better than that of Al coated PHS in perforation corrosion stage.