| abstract |
This zinc-based electroplated steel sheet includes a steel sheet and a zinc-based electroplating layer located on at least one surface of the steel sheet and having a hairline stretched on the surface in a predetermined direction. The zinc-based electroplating layer has a microscopic roughness having a three-dimensional average surface roughness Sa (1 μm)h of more than 200 nm and 2000 nm or less, and a microscopic smoothing portion having a three-dimensional average surface roughness Sa (1 μm) s of more than 5 nm and 200 nm or less. . In the zinc-based electroplating layer, a three-dimensional average surface roughness Sa (50 μm) is continuously measured along a predetermined direction, and R50, which is the ratio of the Sa (50 μm) in the adjacent area formed by two adjacent areas. Is calculated, and when the adjacent area having R50 of less than 0.667 or 1.500 or more is referred to as the adjacent area A, the ratio of the number of adjacent areas A is 30% or more. |