POSCO Holdings Inc.
BLACK PLATED STEEL SHEET AND MANUFACTURING METHOD THEREOF

Abstract:

A black plated steel sheet includes a steel sheet and an Al--Mg--Si-based plating layer disposed on one surface or both surfaces of the steel sheet; in which the plating layer includes a black layer on the outermost surface thereof, and the black layer has a weight ratio of O to (Al+Mg+Si+O) of 0.01 to 0.6.