Henkel Ag & Company, Kgaa

Lisa Salet

Kirk Kramer

A low sludge trivalent chromium based conversion coating bath is provided which forms corrosion resistant coatings on aluminum and aluminum alloys by contact with the bath, which is suitable for use as a rinseable or dry-in place conversion coating for metal, that comprises trivalent chromium cations, fluorometallate anions, guanidinium ions and at least one organic anti-corrosion additive, and other optional components, as well as methods of making and using same, and metals coated using the compositions, the coated aluminum serving as an effective base for paint primers.

Trivalent chromium-containing composition for aluminum and aluminum alloys

A low sludge trivalent chromium based conversion coating bath is provided which forms corrosion resistant coatings on aluminum and aluminum alloys by immersion in aqueous solutions containing trivalent chromium ions and fluorometallate ions followed by optional rinsing. Trivalent chromium coated aluminum also serves as an effective base for paint primers.

Trivalent chromium-containing composition for use in corrosion resistant coatings on metal surfaces

A coating composition and a method for coating metallic substrates for corrosion resistance. In at least one embodiment, the coating composition comprises acid, metal acetate, epoxy silane, aminosilane and water.

Ambient curable corrosion resistant sol-gel coating and composition and process for making the same

Corrosion resistant coatings are formed on aluminum by contacting with aqueous solutions containing trivalent chromium ions and fluorometallate ions, the solutions being substantially free of hexavalent chromium. Trivalent chromium films formed on the aluminum surface when tested in 5% NaCl salt spray chamber showed corrosion resistance in excess of 168 hours. Trivalent chromium coated aluminum also serves as an effective base for paint primers.

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Sterling Heights, MI, United States of America

Lisa Salet