A hot-dip galvanizing method, a method for producing an alloyed hot-dip galvanized steel sheet using the hot-dip galvanizing method, and a method for producing a hot-dip galvanized steel sheet using the hot-dip galvanizing method.

摘要

Provided is a hot dip galvanizing treatment method capable of suppressing the occurrence of dross defects. The hot-dip galvanizing treatment method according to the present embodiment is a hot-dip galvanizing treatment method used for producing a hot-dip galvanized steel sheet or an alloyed hot-dip galvanized steel sheet. This hot-dip galvanizing treatment method includes a sampling step (S1), a Γ2 phase dross amount determining step (S2), and an operating condition adjusting step (S3). In the sample collection step (S1), a sample is collected from the hot-dip galvanizing bath containing Al. In the Γ2-phase dross amount determination step (S2), the Γ2-phase dross amount in the collected sample is obtained. In the operating condition adjusting step (S3), the operating condition of the hot-dip galvanizing treatment is adjusted based on the obtained Γ2 phase dross amount.