| 摘要 |
PROBLEM TO BE SOLVED: To provide a weld H shaped steel achieving both of corrosion resistance and appearance.SOLUTION: A web 12 and a flange 14 contain base materials 12a and 14a, one kind of alloy platings 12b and 14b selected from among a Zn-Al-Mg-Si-based alloy plating, a Zn-Al-Mg-based alloy plating, and a Zn-Al-based alloy plating laminated on the base materials, and chemical treatment coating 12c and 14c laminated on the plating and containing an organic material. Thickness of the chemical treatment coating defined as distance from a surface of the chemical treatment coating to a position with maximum of carbon amount in a depth direction measured by a glow discharge emission analysis method of 1/10 is 0.1 to 0.7 μm.SELECTED DRAWING: Figure 3 |
