Chemfil Corporation

Henkel Ag & Company, Kgaa

Henkel Kommanditgesellschaft Auf Aktien

Thomas W Cape

Harry R Charles

Donald L Miles

David R McCormick

David R Mccormick

In one embodiment, the invention provides a composition useful for passivating a metal surface, in particular a zinciferous surface, comprising, preferably consisting essentially of, most preferably consisting of water and:

Trichrome passivates for treating galvanized steel

A method of treating a zinc-galvanized metal surface, which has been chemically passivated, the treatment providing increased resistance to corrosion and improved adherence to a subsequently applied organic coating comprising contacting a chromium passivated, zinc-galvanized metal surface with a coating solution bath comprising from about 1 to about 10 parts per thousand, based on fluorine content, of an inorganic acid or ion that contains fluorine; at least 0.5 parts per thousand, based on transition metal cation content, of an oxide and/or a salt of nickel; and optionally, from about 0 to about 3.0 grams per liter of a polymer selected from the group consisting of polyacrylic acid, polymethacrylic acid, and Cto Calkanol esters thereof; wherein the pH of the solution is from about 2.0 to 3.6 and the temperature of the solution is at least 60&#xb0; C.; and thereafter sealing the treated surface.

Method for treatment of chemically passivated galvanized surfaces to improve paint adhesion

This invention relates to a method of coating metal surfaces including zinc-coated steel with zinc, nickel and manganese phosphate crystals for the purposes of improving paint adhesion, corrosion resistance, and resistance to alkali solubility. Potassium, sodium, or ammonium ions present as a phosphate salt are combined with zinc ions and nickel and manganese ions in relative proportions to cause the nickel and manganese ions to form a crystalline coating on the surface in combination with the zinc and phosphate.

Phosphate coating composition and method of applying a

This invention relates to a method of coating metal surfaces including zinc-coated steel with zinc and nickel phosphate crystals for the purposes of improving paint adhesion, corrosion resistance, and resistance to alkali solubility. Potassium, sodium, or ammonium ions present as a phosphate salt are combined with zinc ions and nickel or manganese ions in relative proportions to cause the nickel or manganese ions to form a crystalline coating on the surface in combination with the zinc and phosphate.

Phosphate coating composition and method of applying a zinc-nickel

A solution containing pentavalent vanadium is applied to a metal surface subsequent to conversion coating. The solution contains pentavalent vanadium ions which may be obtained from a sodium metavanadate or sodium metavanadate/orthovanadate solution that is acidified with an acid. Vanadium pentoxide may be dissolved in a base such as sodium hydroxide, potassium hydroxide or lithium hydroxide to form a basic concentrate which can be acidified conveniently after dilution. In one disclosed embodiment, the solution comprises vanadium pentoxide, sodium hydroxide, nitric acid and water which is applied to a phosphate conversion coated surface than rinsed with deionized water prior to priming and painting.

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West Bloomfield, MI, United States of America

Thomas W Cape