HOT DIP ZN ALLOY PLATED STEEL WIRE HAVING EXCELLENT ANTI-CORROSION AND METHOD FOR MANUFACTURING THE STEEL WIRE USING THE SAME

摘要

A hot dip zinc alloy plated steel wire having excellent corrosion resistance according to an embodiment of the present invention includes a matrix steel wire and a hot dip zinc alloy plated layer. A composition of the hot dip zinc alloy plated layer includes aluminum (Al): 0.5-15 wt%, magnesium (Mg): 0.5-3 wt%, the remaining zinc (Zn) and inevitable impurities. The hot dip zinc alloy plated layer has a metal structure wherein a Zn single phase structure, a Zn/MgZn_2 binary process structure, an MgZn_2 single phase structure and a Zn/Al/MgZn_2 triple process structure are mixed. An area ratio of the Zn/MgZn_2 binary process structure and the MgZn_2 single phase structure observed at a cross section in a linear particle size direction of the hot dip zinc alloy plated layer may be 50% or more.