Abstract: A galvanized steel sheet according to one aspect of the present invention comprises: a base steel sheet; and a Zn-Al-Mg-based plating layer provided on at least one surface of the base steel sheet, wherein the Zn-Al-Mg-based plating layer may include a surface modified region enriched with cerium (Ce) on a surface layer side of the Zn-Al-Mg-based plating layer.

Abstract: The present invention relates to a color-treated base material and a base material color treatment method therefor. The base material is capable of improving the homogeneity and corrosion resistance of the surface of the base material and realizing a uniform color in a short period of time. Accordingly, the color-treated base material can be usefully used in the fields of building exterior materials, automobile interiors, and particularly electrical and electronic component materials, such as mobile phone case components, in which a magnesium material is used.

Abstract: This color-treated base material, which comprises a matrix comprising magnesium, a film formed on the matrix and containing a compound represented by chemical formula 1, and a wavelength conversion layer formed on the film, can improve the durability of the base material while maintaining the unique metal texture and gloss of the base material and can uniformly realize various colors, such as blue and green, including an achromatic color such as black, on the surface of the base material and thus can be usefully used in the fields of building exterior materials, automobile interiors, and particularly electrical/electronic component materials, such as mobile product frames, in which a metal material is used.