| abstract |
An object of the present invention is to provide a method for producing a Zn—Al—Mg-based alloy plated steel material having a uniform, high adhesion amount and high corrosion resistance by a flux method. SOLUTION: After removing an oxide film on the surface of a steel material by mechanical descaling, flux treatment is performed, and in mass%, Al: 0.1 to 5%, Mg: 0.1 to 5%, balance Zn and unavoidable. Zn-Al characterized in that it is immersed in a Zn-Al-Mg-based alloy plating bath containing an impurity-containing bath at a temperature of 420 to 550 ° C to form a Zn-Al-Mg-based plating layer on a steel material surface in a high adhesion amount. -A method for producing a Mg-based alloy-plated steel material. [Selection diagram] None |