Additives for chloride-based zinc-iron alloy electroplating solutions and plating solutions containing them

摘要

The present invention provides an additive for an additive of a chloride-based zinc-iron alloy electroplating solution and a plating solution containing the same, which can produce a zinc-iron alloy electroplated steel sheet improved in surface roughness, surface color and microstructure of a plating layer I do it repeatedly. The present invention relates to a pharmaceutical composition comprising polyethylene glycol (H (OCH₂CH₂) NOH is in the range of 10 to 20 and in the range of 20 to 30, and the composition is mixed so that the constituent weight ratio is 1: 2 to 1: 5, and the concentration thereof is 10 to 15 wt% An additive for a chloride-based zinc-iron alloy electroplating solution which is prepared by adding 0.1 to 5.0% by weight and 1.0 to 10.0% by weight of an aromatic acid and a formaldehyde solution to the aqueous polyethylene glycol solution, respectively, based on the weight of the polyethylene glycol, The present invention provides a chloride-based zinc-iron alloy electroplating solution containing 0.5 to 8.0 ml / liter.