Process of cleaning metals by the spray method

Details Process of cleaning metals by the spray method Process of cleaning metals by the spray method

C - Chemistry, Metallurgy

23

G

134/27

C23G 1/02 (2006.01) C23G 1/18 (2006.01)

Patent

CA 1118660

ABSTRACT OF THE DISCLOSURE A method of cleaning metal surfaces comprising spray- ing a metal surface with an aqueous solution containing a) at least one soluble salt of a carboxylic acid having 6 to 12 carbon atoms selected from the group consisting of aromatic carboxylic acids, aliphatic carboxylic acids and mix- tures thereof, b) at least one nonionic surface-active compound, c) at least one quaternary ammonium surface-active compound, where the concentration of the active-substances a), b) and c) in the aqueous solution is from 0.1% to 4% by weight and the weight ratio of b) to c) is from 20:1 to 1:1 and the weight ratio of a) to b) + c) is from 20:1 to 1:20, where the pH of the aqueous solution is from 7.5 to 11. -A-

299639

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