| 摘要 |
PURPOSE: A Zn-Ni alloy electroplating solution and a method for manufacturing Zn-Ni alloy electroplating steel sheet using the same are provided which can manufacture a Zn-Ni alloy electroplating steel sheet having superior appearance of the surface and cohesion by using a basic solution in which zinc chloride and nickel chloride are used as a basic materials and chloride ions are adjusted by potassium chloride, and adding ammonium chloride and an appropriate amount of a mixed additive of sodium salt condensed naphthalene sulfonic acid and sodium sulfate as an additive. CONSTITUTION: The Zn-Ni alloy electroplating solution is prepared by adding 0.1 to 1.0 mols of ammonium chloride, 1:0.001-0.008 mol ratio of sodium sulfonate for the ammonium chloride, and 1:0.1 - 0.5 mol ratio of sodium sulphate for the sodium sulfonate to a chloride based Zn-Ni alloy electroplating solution comprising 0.5 to 2.0 mols of zinc ions, 0.1 to 0.5 mols of nickel ions and 6.0 to 9.0 mols of chloride ions. In a method for electroplating Zn-Ni on a substrate metal, the method for manufacturing Zn-Ni alloy electroplating steel sheet comprises the process of electroplating the substrate metal using the Zn-Ni alloy electroplating solution under the plating conditions of pH of the plating solution of 2.5 to 4.5, a temperature of the plating solution of 55 to 70 deg.C, a current density of 40 to 180 A/dm2, and a relative flow rate of the plating solution and an anode of 0.5 to 2.5 m/sec.
|
