| 摘要 |
PURPOSE:To provide a superior chemical conversion treatability, by applying Zn-Ni alloy electroplating previously as the first layer, then applying Zn-Ni-Ti alloy electroplating to a specified thickness as the second layer. CONSTITUTION:Zn-Ni-Ti alloy electroplating is applied to steel sheet or strip. Thereat, Zn-Ni alloy electroplating is applied previously as the first layer. Then, Zn-Ni-Ti alloy electroplating is applied at 1-15g/m<2> per one side as the second layer. In such a way, Zn-Ni-Ti alloy plated steel sheet or strip superior in phosphate treatability is obtd.
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