Plated steel material having excellent adhesion to plating and corrosion resistance
AssigneePosco
InventorsSeok-Jun Hong, Woo-Sung Jung
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Abstract
A Zn—Mg alloy plated steel material having excellent adhesion to plating and corrosion resistance comprises base steel and a plating layer formed on the surface of the base steel, wherein the plating layer comprises a Zn single phase, a Mg single phase, an MgZn2 alloy phase, and an Mg2Zn11 alloy phase, the Zn single phase is contained in the plating layer at a proportion of 15 to 19 volumes, and the proportion of the Zn single phase in a lower t/2 area of the plating layer adjacent to the base steel may be greater than the proportion of the Zn single phase in an upper t/2 area of the plating layer on the surface layer side of the plating layer. (Here, t means the thickness (μm) of the plating layer).
Claims5
A Zn—Mg alloy plated steel material having excellent plating adhesion and corrosion resistance, the Zn—Mg alloy plated steel material comprising:
- base steel and a plating layer formed on a surface of the base steel,
- wherein the plating layer includes a Zn single phase, a Mg single phase, a MgZn2 alloy phase, and Mg2Zn11 alloy phase,
- the Zn single phase is included in the plating layer in a proportion of 15 volume % to 19 volume %, and
- a proportion of the Zn single phase by volume % in a lower t/2 region of the plating layer adjacent to the base steel is greater than a proportion of the Zn single phase by volume % in an upper t/2 region of the plating layer adjacent to a surface layer portion of the plating layer where t is a thickness (μm) of the plating layer.
Dependencies are inferred from the claim text.