Alloy-plated steel material having excellent corrosion resistance and high surface quality
Provided is an alloy-plated steel material that can be used in home appliances, automobiles, and construction materials and the like and, more particularly, to an alloy-plated steel material having excellent corrosion resistance and high surface quality.
1. An alloy plated steel material having excellent corrosion resistance and surface quality, comprising:
a base iron, and a zinc alloy plated layer formed on at least one surface of the base iron,
wherein the zinc alloy plated layer comprises, by wt %, 0.5 to 2.0% of Mg, 0.5 to 2.5% of Al, and a balance of Zn and other inevitable impurities, and
a surface of the zinc alloy plated layer comprises a Zn single phase of a ratio of 15% or higher by an area fraction, and an average diameter of the Zn single phase is 30 μm or greater.
2. The alloy plated steel material of claim 1 , wherein a surface roughness, Ra, of the zinc alloy plated steel material is 0.4 to 2.3 μm.
3. The alloy plated steel material of claim 1 , wherein a surface gloss of the zinc alloy plated steel material is 40 to 120 at a surface measurement angle of 20° with reference to ISO 2813.
4. The alloy plated steel material of claim 1 , wherein a plating delamination width of the zinc alloy plated steel material according to VDA 233-102 satisfies Relational Expression 1 below:
Plating delamination width (mm)<−0.8×Mg content (wt %) in plating layer+3. [Relational Expression 1]