COATED STEEL MATERIAL WITH EXCELLENT LASER CUTTABILITY, PRIMARY RUST PREVENTION PERFORMANCE, AND LEGIBILITY

摘要

Provided is a coated steel material which combines excellent laser cuttability with excellent primary rust prevention performance and which is excellent in terms of legibility, in particular, the legibility of characters written with a white paint. Specifically, the coated steel material comprises a steel material and, formed as a dry coating film on a surface thereof, a coating film which contains a titania powder, a zinc powder, an aluminum powder, and a color pigment comprising one or more of black iron oxide pigments and black burned pigments, the contents of the titania powder, zinc powder, and aluminum powder being 4.5-26 g/m2, 5-30 g/m2, and 0.1-10 g/m2, respectively. When the contents of the titania powder, zinc powder, aluminum powder, and color pigment are expressed by A g/m2, B g/m2, C g/m2, and X g/m2, respectively, the value of Y represented by equation (1) is 0.010-0.200. The surface of the dry coating film has a Munsell lightness of 7.0 or less. Y=X/(A+B+C) (1)