| 摘要 |
In the preparation of a galvanized steel strip by continuously heating and anneal reducing a steel strip and subsequently admitting it, without contact with the ambient air, into a molten zinc bath to coat the strip with zinc, there is provided a method for preparing a galvanized or galvannealed steel strip having minimal uncoated defects, characterized in that a steel strip having a composition which contains up to 0.1% by weight of C, 0.01 to 1.0% by weight of Si, 0.05 to 2.0% by weight of Mn, and up to 0.15% by weight of P, and satisfies the following formula (1): Si/28+Mn/55+P/31>/=0.01(1) wherein the element symbols represent the contents in % by weight of the respective elements in the steel strip is used as the starting strip to be galvanized, and the steel strip is subjected to carburizing treatment during the anneal reducing step or before the anneal reduced steel strip is admitted into the molten zinc bath.
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