Ppg Industries Ohio, Inc.

David A Raney

Nicephoros A Fotinos

Randall J Brent

John F McIntyre

Richard M Vargas

Shan Cheng

Edward Francis Rakiewicz

Mark W McMillen

James A DeChant

James D Chant

Mark Mcmillen

James A Dechant

Disclosed are replenisher compositions and methods of replenishing pretreatment compositions. The methods include adding a replenisher composition to a pretreatment composition wherein the replenisher composition includes: (a) a dissolved complex metal fluoride ion wherein the metal ion comprises a Group IIIA metal, Group IVA metal, Group IVB metal, or combinations thereof; (b) a component comprising an oxide, hydroxide, or carbonate of Group IIIA, Group IVA, Group IVB metals, or combinations thereof; and optionally (c) a dissolved metal ion comprising a Group IB metal, Group IIB metal, Group VIIB metal, Group VIII metal, Lanthanide Series metal, or combinations thereof.

Replenishing compositions and methods of replenishing pretreatment compositions

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.

Methods for treating a ferrous metal substrate

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Brook Park, OH, United States of America

David A Raney