Posco

Ju-Youn Lee

Myung-Soo Kim

Jong-Sang Kim

Kwang-Geun Chin

Young-Ha Kim

Sun-Ho Jeon

Seung-Bok Lee

Hyun-Jun Tark

Moon-Hi Hong

Jun-Woo Park

Provided is a hot-dip galvanized steel sheet having excellent adhesiveness at ultra-low temperatures as well as fine spangles, and a method of manufacturing the same. According to the present invention, a hot-dip galvanized steel sheet having excellent adhesiveness at ultra-low temperatures includes a base steel sheet, a composite layer formed on the base steel sheet and including transition metal, an inhibition layer formed on the composite layer and including a iron-aluminum (Fe&#x2014;Al) based intermetallic compound, and a zinc (Zn)-plated layer formed on the inhibition layer, in which an average diameter of spangles in the zinc-plated layer is 150 &#x3bc;m or less, and a method of manufacturing the hot-dip galvanized steel sheet is provided.

Hot-dip galvanized steel sheet having excellent adhesiveness at ultra-low temperatures

Provided is a metal coated steel sheet having a coating layer including a metal having a level of Gibbs free energy equal to that of Fe or above and an oxide thereof. Accordingly, the quality of a plated steel sheet may be improved by preventing the generation of bare spots through inhibition of the formation of Mn oxide, Si oxide, or Al oxide on the surface thereof, and simultaneously, the complexity of a manufacturing facility or an increase in manufacturing costs may be minimized. Economic benefits are thus realized.

Metal-coated steel sheet

Growing community of inventors

Jeollanam-do, South Korea

Ju-Youn Lee