| abstract |
Pickling solution for pickling a metal, wherein the pickling solution based on one liter of the pickling solution has: 200 to 500 ml of concentrated hydrochloric or sulfuric acid, - 500 to 800 ml of water, 1.5 to 2.5 g of sodium metasilicate, 0.08 to 0.5 g of an alkyl arylsulfonate alkyl chain, 0.01 to 0.13 g of polyalkylene glycol ether, 0.01 to 0.13 g of ethoxylated fatty amine, 0.005 to 0.06 ml of a 20-50% aqueous fluorosurfactant alcohol solution, the fluorosurfactant being selected from the group of quaternary fluoroalkylammonium salts. |