| 简介 |
PROBLEM TO BE SOLVED : To enable a re-plating treatment yielding a favorable hue with reduced treatment steps.
SOLUTION : An electroplating treatment facility is used in which a steel sheet 12 is passed through a continuous treatment line to be continuously subjected to electroplating and coating. In the continuous treatment line, a pickling treatment part 4, an electroplating part 5 equipped with a plurality of stages of electroplating treatment tanks 6 wherein power distribution is carried out with a standard current density A0 and a coating treatment part equipped with a roll coater 7, are disposed in this order. When carrying out the re-plating treatment in the continuous treatment line, only a part of the electroplating treatment tanks 6a and 6b are used, and the current density in the electroplating treatment tanks 6a and 6b is set to a high current density AM that is higher than the upper limit of the standard current density A0.
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