Metal plating iron-containing substrates

摘要: An improved plating solution for metal iron-containing metallic substrates comprising from about 1 to 35 weight percent of an aqueous containing ions be deposited on the substrate, and 65 99 acidic component having a pH value less than 1. The is produced by (a) admixing 45 85 hydrochloric acid with 20 55 phosphoric in suitable vessel effective period time produce substantially homogeneous mixture; (b) mixture amount water provide (c) 2 hydroxy carboxylic 0 dicarboxylic mixture.