Chemical treatment steel sheet, and method for producing chemical treatment steel sheet

A chemical treatment steel sheet comprising:

• a steel sheet;
• a composite coated layer which is formed on at least one surface of the steel sheet, and contains 2 to 200 mg/m2 of Ni in terms of an amount of metal Ni and 0.1 to 10 g/m2 of Sn in terms of an amount of metal Sn, and in which an island-shaped Sn coated layer is formed on a Fe—Ni—Sn alloy layer;
• and
• a chemical treatment layer that is formed on the composite coated layer, and consists of 0.01 to 0.06 mg/m2 of Zr compounds in terms of an amount of metal Zr, 0.01 to 5 mg/m2 of phosphate compounds in terms of an amount of P, and unavoidable impurities, wherein
• a surface of the chemical treatment layer is covered with neither a film nor a coating.