The invention provides a method and composition for coating a ferrous metal surface with a zirconium/vanadium conversion coating which is substantially free of an organic film forming composition and tannins. The method is a low temperature method which contemplates an aqueous conversion coating composition which is low in phosphates and which comprises zirconium, vanadium, fluoride, as well as phosphate ions in a ratio and a concentration effective for providing a conversion-coated ferrous metal surface.
C23C 22/42 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH < 6 containing molybdates, tungstates or vanadates containing also phosphates
C23C 22/44 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH < 6 containing molybdates, tungstates or vanadates containing also fluorides or complex fluorides
C23C 22/34 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH < 6 containing fluorides or complex fluorides
C23C 22/50 - Treatment of iron or alloys based thereon
Aqueous compositions in the nature of coating compositions which react with a metal surface for the formation of conversion coatings thereon, namely, compositions which form a coating on metal surfaces for corrosion inhibition and protection
09 - Scientific and electric apparatus and instruments
Goods & Services
Electronic and computer controls for controlling and monitoring industrial and commercial manufacturing processes, namely paint line control and monitoring, metal fabricating control and monitoring, storage tank control and monitoring, energy management control and monitoring, security and intrusion control and monitoring, building access control and monitoring, lighting control and monitoring, fire and safety control and monitoring and elevator control and monitoring
