Ni-PLATED STEEL SHEET, AND METHOD FOR PRODUCING Ni-PLATED STEEL SHEET

A method for producing a Ni-plated steel sheet, comprising:

• a first plating process of subjecting a steel sheet to an electrolysis treatment in a first Ni-plating bath containing 5 g/L to 60 g/L of Ni ions, 20 g/L to 300 g/L of sulfate ions, 10 g/L to 60 g/L of borate ions, and less than 0.5 g/L of chloride ions to form a first Ni-plated layer on the steel sheet;
• and
• a second plating process of subjecting the steel sheet, on which the first Ni-plated layer is formed, to an electrolysis treatment in a second Ni-plating bath containing 5 g/L to 60 g/L of Ni ions, 20 g/L to 300 g/L of sulfate ions, 10 g/L to 60 g/L of borate ions, and 10 g/L to 60 g/L of chloride ions to form a second Ni-plated layer on the first Ni-plated layer,
• wherein a temperature of the first Ni-plating bath and a temperature of the second Ni-plating bath are equal to or higher than 10° C. and lower than 90° C., and
• in the first plating process and the second plating process, the electrolysis treatment is performed at a current density of 1.0 A/dm2 to 100 A/dm2 for an electrolysis treatment time of 0.2 seconds to 150 seconds.