method of manufacturing Zn-Fe alloy electrodeposit electorlyte with good surface roughness and appearance

摘要

The present invention is less than 2.5 mol / liter, the molar concentration of zinc ions in the zinc chloride exceeds 0.5, iron ions the molar concentration of less than 0.1 more than 0.5 mol / liter, the molar concentration of chloride ions exceeds 4.0 9.0 mol / liter, less than iron ions: 0.05 to less than 0.3 greater than the default ratio of the (iron-on + zinc ions), and polyethylene glycol ( H (OCH ₂ CH ₂ ) _n 1 each number n is the degree of polymerization of 10 or more 20 or more 30 or less than the range and scope of the OH 20 mixed and the mixing ratio is more than a weight ratio to 1: 2 or more 1:05 mixture concentration of polyethylene glycol is less than 5 or less than 15% concentration in aqueous solution of 5.0 or greater is vanillin O 20 g / L or less, and this was added to the sodium sulfonate or more 20 50 g / L or less is the addition of organic additives which contain a concentration of 0.5 or 8.0 ml / L or less in total chloride based plating zinc to improve the surface roughness and appearance by plating an iron alloy electroplating gold and suppress trajectory characterized in that the zinc-iron alloy and the manufacturing method of the electroplated steel sheet as a base