Process for producing zinc-iron alloy continuous electroplated steel sheet excellent in workability and corrosion resistance after painting

摘要

The present invention relates to a method for producing a zinc-iron alloy continuous electroplated steel sheet, which comprises the steps of using ammonium chloride as a conductive auxiliary agent and controlling the plating composition and plating conditions precisely, thereby controlling the iron content and easily coating the deviation, It is an object of the present invention to provide a method of manufacturing a continuous electroplated galvanized steel sheet.;The present invention relates to a method for producing a zinc-iron alloy continuous electroplated steel sheet, which comprises the steps of adding 290-320 g / l ammonium chloride as a conductive auxiliary agent and 0.5-2 m / l a polishing agent, Wherein the continuous electroplating is carried out such that the iron content in the plating film is 15 to 20 wt% at a plating condition of 50 to 60 DEG C, a current density of 20 A / dm2 or more, and an electrolytic solution flow rate of 1.5 m / sec or more The present invention relates to a process for producing a zinc-iron alloy continuous electroplated steel sheet excellent in workability and post-drilling corrosion resistance.