ZINC-MAGNESIUM VAPOR DEPOSITION METHOD USING MULTIPLE DUCT AND VAPOR DEPOSITION EQUIPMENT

PROBLEM TO BE SOLVED: To economize the space and to remarkably reduce the equipment cost and running cost, in a Zn-Mg vapor deposition method, by arranging plural ducts along the running direction of a plating original sheet in one vapor deposition chamber and feeding Zn vapor and Mg vapor for vapor deposition toward the surface of the plating original sheet from each duct. SOLUTION: In Zn-Mg vapor deposition plating equipment, along the running direction of a plating original sheet 10, from the upstream side, a nonoxidizing furnace 20, a reduction annealing furnace 25, a vacuum chamber 30, a Zn-Mg vapor deposition chamber 90 and cooling devices 70 and 75 are arranged, and furthermore, in the Zn-Mg vapor deposition chamber 90, along the running direction of the plating original sheet 10, from the upstream side, a duct 91 for pre-Zn vapor deposition, a duct 92 for Mg vapor deposition and a duct 93 for post-Zn vapor deposition are arranged, and Zn vapor and Mg vapor are fed toward the surface of the plating original sheet 10 from each duct.