Chrome-free composition of low temperature curing for...

C - Chemistry – Metallurgy – 23 – C

Patent

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C23C 22/40 (2006.01)

Patent

CA 2612904

Provided is a chromium-free, low-temperature curable, metal-surface treatment composition comprising 5 to 30 parts by weight of a silane compound having an epoxy group and a silane compound having an amino group or a hydrolytic condensate thereof; 0.1 to 5 parts by weight of a vanadium compound; 0.1 to 5 parts by weight of a magnesium compound; 1 to 10 parts by weight of organic/inorganic acids; 0.05 to 2 parts by weight of a crosslinking accelerating and coupling agent; 0.01 to 1 part by weight of an antifoaming agent; 1 to 2 parts by weight of a wetting agent; and the balance of water and ethanol, based on 100 parts by weight of the total solution. In addition, a steel sheet coated with the metal-surface treatment composition of the present invention is low-temperature curable and is capable of securing anticorrosiveness even without containing chromium components.

L'invention concerne une composition de traitement d'une surface métallique durcissable à basse température sans chrome comprenant 5 à 30 parties en poids d'un composé silane ayant un groupe époxy et d'un composé silane ayant un groupe amino ou d'un produit de condensation hydrolytique de ceux-ci ; 0,1 à 5 parties en poids d'un composé du vanadium ; 0,1 à 5 parties en poids d'un composé du magnésium ; 1 à 10 parties en poids d'acides organiques/inorganiques ; 0,05 à 2 parties en poids d'un agent d~accélération de la réticulation et de couplage ; 0,01 à 1 partie en poids d'un agent antimousse ; 1 à 2 parties en poids d'un agent mouillant ; et le reste étant de l'eau et de l'éthanol, sur la base de 100 parties en poids de la solution totale. En plus, une feuille d'acier enduite de la composition de traitement d'une surface métallique de la présente invention est durcissable à basse température et est capable de garantir un caractère anticorrosion même sans contenir de composants du chrome.

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