Bath for electrolytic Coating of ferrous substrates and Method for the preparation of an Ethoxylated Naphthol sulfonic acid used in the same

摘要

A method for the electroplating of steel strip in a tin plating bath utilizing therein a brightening agent comprising ethoxylated-naphthol sulfonic acid, wherein the ethylene oxide to naphthol ratio is 6 or 7:1.