| 摘要 |
Surface of metal bands covered with a coating is passivated by moving tin-coated steel bands at a band speed through a coating installation, and spraying an aqueous solution of a surface active substance on the coated metal band moving at the band speed. The coated metal band is dried after squeezing the surface active substance. A thin film of the surface active substance is present with an overlay of 2-10 mg/m2>. Independent claims are included for: (1) a device for the application of a metallic coating on a steel band, particularly a band tin-coating installation, comprising an application device for electrolytic application of a thin tin layer on the steel band, and a passivation device (2) for the passivation of the metal layer; and (2) a method of using a substance during the manufacture of tin-coated steel bands, comprising providing the substance containing a polymer having a chemical composition of polymethyl siloxane with polyether lateral chains, a refractive index of 1.456-1.466, and a density at 20[deg]C. of 1.09-1.13 g/cm3>; a polymer having a chemical composition of an acidic polyether with a density of 1.20-1.30 g/cm3> and an acid index of 270-3 10 mg potassium hydroxide/g; or a polymer containing 0-80 (5-80) mol.% monomer(s) of formula (1), 0-70 mol.% monomer(s) of formula C(R5)(R6)=C(R7)(C(OR8)=O), 5-50 mol.% monomer(s) containing a heterocyclic group with at least one basic ring nitrogen atom or to which such a heterocyclic group is attached after polymerization, 0-10 mol.% monomer(s) containing group(s) reactive for crosslinking or coupling, or 0-20 mol.% monomer(s) that do not fall into the above groups where the quantity of the monomers in the first group together with monomers containing acrylate group is at least 20 mol.% as well as their organic salts; and spraying the substance as an aqueous solution on the tin-coated steel bands. R1-R4H or alkyl; R5-R7H or alkyl; and R8optionally substituted alkyl, where the alkyl can be interrupted by -O groups. [Image] |
