Chromate-free phosphate bonding composition

Details Chromate-free phosphate bonding composition Chromate-free phosphate bonding composition

C - Chemistry, Metallurgy

23

C

C23C 22/05 (2006.01) C04B 28/34 (2006.01) C23C 22/07 (2006.01) C23C 22/74 (2006.01)

Patent

CA 2323122

A heat curable bonding composition for providing a coating to a solid substrate comprises water, phosphate ions, borate ions, and aluminum ions. The bonding composition has a pH in the range from about 1.4 to about 2.2, and is substantially free of chromate ions, molybdate ions, and magnesium ions.

L'invention concerne une composition de liant par polymérisation à chaud pour fournir un revêtement à un substrat solide, ladite composition comprenant de l'eau, des ions de phosphate, des ions de borate et ions d'aluminum. La composition de liant présente un pH d'environ 1,4 à 2,2, et est sensiblement exempte d'ions de chrome, d'ions de molybdate et d'ions de magnésium.

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