... 310S,316,316L,321,430F And So On Certification BV Standard AISI,ASTM,DIN,EN ... chromium present. Unprotected carbon steel rusts readily when exposed to air and moisture. This iron oxide film ... away. Stainless steels contain sufficient chromium to form a passive film of chromium oxide, which ... , because of its corrosion resistance and antibacterial properties. This also influences its use in commercial ...