| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuous galvanizing method with which the development of zinc powder defect can easily and effectively be prevented. SOLUTION: In the continuous galvanizing method, with which the coated thickness is controlled by blowing wiping gas 5 to a band steel 1 pulled up from a galvanizing bath 2 through a wiping nozzle 3A, a position from the upper part of the nozzle in a wiping device 3 to near supporting rolls 4 above the bath at the upper part thereof, is covered with a hood 7 from the back face side of this device. The control of the coated thickness with the gas wiping is performed while blowing purge gas 9 into the hood 7 at a flow-rate W1 exceeding the blowing flow-rate W2 of the wiping gas 5 through e.g. a gas exhausting duct 8. COPYRIGHT: (C)2004,JPO
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