NITRITFREIE WAESSRIGE NASSDRESSIERMITTEL

摘要

The invention concerns a nitrite-free wet dressing agent for preventing the contamination of rollers and corrosion of the rolled sheet, the dressing agent containing a carboxylic acid and an amine, characterized in that the nitrite-free aqueous wet dressing agent consists of at least 2-20 % by wt of a monovalent with 6-20 C-atoms or a divalent with 4-12 C-atoms aliphatic and/or aromatic and/or arylaliphatic carboxylic acid, 0-10 % by wt of boric acid, 0.1-10 % by wt of an N-acylated derivative of N-methylglycine of the general formula (I) in which R = a saturated or unsaturated C11-C19 alkyl group and M = H, Li, Na, K, ammonium or alkanolammonium, 0-5 % by wt of a water-hardness-complexing agent, 0-0.5 % by wt of a perfuming agent, an amine which forms a salt with said carboxylic acid in aqueous solution and which is added in a quantity such that the pH-value is between 8 and 11, the remainder consisting of water. The invention also concerns a process for finishing steel strip, using this aqueous wet dressing agent.