Cleaning solution containing a mixture of polyoxyalkylene nonionic surfactants for cleaning metal surfaces

摘要

A cleaning solution for cleaning and / or wetting a metal surface, wherein the cleaning solution is at least one acid, a first surfactant, and an alkylpoly (ethylene glycol) having a cloud point of ≤25 ° C. A first surfactant that is a -co-propylene glycol) ether, a second surfactant selected from the group consisting of: i) Alkyl poly (ethylene glycol-co) with a cloud point of ≥30 ° C. -Propropylene glycol) ether, ii) Containing alkyl polyethylene glycol ether having a cloud point of ≥45 ° C., where the cloud point is relative to the German version of European Standard EN 1890: 2006, paragraph 8.2. A washing solution obtained according to a modification using 10% by weight of H2SO4 as a solvent and adjusting the concentration of the surfactant to 1000 mg / L.