Aqueous reaction solution and method of passivating...

Details Aqueous reaction solution and method of passivating... Aqueous reaction solution and method of passivating...

C - Chemistry, Metallurgy

23

C

C23C 22/53 (2006.01) C23C 22/17 (2006.01) C23C 22/34 (2006.01) C23C 22/84 (2006.01)

Patent

CA 2624215

For producing corrosion resistant yellow passivate layers on zinc and zinc alloy surfaces, an aqueous reaction solution is utilized that contains trivalent chromium ions, at least one acid as well as at least one heteroaromatic compound selected from the group comprising nicotinic acid, the salts and derivatives thereof.

L'invention concerne une solution de réaction aqueuse utilisée pour la fabrication de couches de passivation jaunes résistantes à la corrosion sur des surfaces en zinc ou en alliage de zinc, ladite solution contenant des ions chrome trivalents, au moins un acide, ainsi qu'au moins un composé hétéroaromatique choisi parmi le groupe comprenant l'acide nicotinique, ses sels et ses dérivés.

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