| 摘要 |
PURPOSE: To enable a steel sheet to correspond to a request for the quality in the appearance by previously executing sticking of Co plating to it at a specified relative flow rate. CONSTITUTION: For example, simulatively, a steel sheet applied with microflaws is used as an original sheet, and Co plating and electrogalvanizing are executed. Then, at the time of coating it with Co plating by 5 to 300mg/m<2> coating weight at >=0.5m/sec relative flow rate, the generation of inferiority in the appearance is made small. Namely, in the case of >=0.5m/sec, the generating ratio of stains in the appearance is made small. In the case of the coating weight of <5mg/m<2> , the generating ratio of inferiority in the appearance is made high, and in the case of >=5mg/m<2> , it is made small. Furthermore, even in the case of >300mg/m<2> , the effect on stains in the appearance can be maintained, but its corrosion resistance, particularly, corrosion from the edge parts becomes the cause of fear, and it is not preferable. Thus, microstains in the appearance after electrogalvanizing caused by the original sheet can be improved.
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