Disclosed are methods for treating and coating a ferrous metal substrate, such as cold rolled steel, hot rolled steel, and electrogalvanized steel. These methods include contacting the ferrous metal substrate with an aqueous pretreatment composition comprising: (a) a Group IIIB and/or IVB metal compound; (b) phosphate ions; and (c) water.
申请公布号
EP2193224(B1)
申请公布日期
2016.11.09
申请号
EP20080834825
申请日期
2008.09.26
申请人
PPG INDUSTRIES OHIO, INC.
发明人
BRENT, RANDALL J.;FOTINOS, NICEPHOROS A.;MCINTYRE, JOHN F.;RANEY, DAVID A.;VARGAS, RICHARD M.
