| 摘要 |
A hot-pressed member includes a steel sheet, a Ni-diffusion region present in a surface layer of the steel sheet, and an intermetallic compound layer and a ZnO layer which are provided in order on the Ni-diffusion region, the intermetallic compound layer corresponding to a ³ phase present in a phase equilibrium diagram of a Zn-Ni alloy, wherein a spontaneous immersion potential indicated in a 0.5 M NaCl aqueous air-saturated solution at 25°C ± 5°C is -600 to -360 mV based on a standard hydrogen electrode. The hot-pressed member can be produced without producing scales and can be suppressed from suffering hydrogen entry into steel associated with corrosion and has excellent coating adhesion and corrosion resistance after coating. |
