| 摘要 |
PURPOSE:To enhance the corrosion resistance and coatability of a steel plate by hot-dipping the surface of the plate in a hot dipping bath of a Zn alloy having a specified composition. CONSTITUTION:In the manufacture of a steel plate plated with a Zn alloy by hot-dipping as a base plate for a car member requiring high corrosion resistance or a precoated steel plate for a vessel requiring high coatability, hot dipping is carried out in a Zn alloy bath consisting of 0.1-25.0% Al, 0.05-2.0% Mg, 0.005-1.5% Sb, <0.01% Pb and the balance Zn. The resulting steel plate plated with the Zn alloy by hot dipping is provided with enhanced corrosion resistance owing to the addition of Al and Mg, further improved corrosion resistance owing to the control of the Pb content and superior coatability owing to the addition of Sb. |
