Manufacturing method for plated steel material having excellent adhesion to plating and corrosion resistance

A method of manufacturing a Zn—Mg alloy plated steel having excellent plating adhesion and corrosion resistance, the method comprising:

• sequentially forming a first Zn plating layer, a second Mg plating layer, and a third Zn plating layer on a base steel by a physical vapor deposition (PVD) method to form a plated steel material on the base steel;
• after forming the plated steel material, heating the plated steel material for alloying heat treatment to form an alloy plated steel material on the base steel;
• and
• cooling the alloy plated steel material,
• wherein the second Mg plating layer has a thickness of 30% to 35% of a total thickness of the first Zn plating layer, the second Mg plating layer, and the third Zn plating layer,
• the first Zn plating layer has a thickness of 1.1 to 4 times a thickness of the third Zn plating layer, and
• the first Zn layer has a thickness exceeding 2 μm.