ZN-NI-TI ALLOY PLATING METHOD SUPERIOR IN CHEMICAL CONVERSION TREATABILITY

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/m2 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.