Hot-dip Al-Zn plated steel sheet, method for producing same, surface-treated steel sheet, and coated steel sheet

• Main Authors: TAIRA, SHOICHIRO, IWANO, SUMIHISA, YOSHIDA, MASAHIRO, SATO, YOUHEI, KANNO, FUMITAKA
• Format: Patent
• Language: Chinese; English
• Published: 01.10.2023
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

Provided is a hot-dip Al-Zn plated steel sheet that has excellent corrosion resistance in a stable manner with certainty. The hot-dip Al-Zn plated steel sheet according to the present invention comprises a plating film and is characterized in that the plating film has a compositional makeup containing 45-65 mass% of Al and 1.0-4.0 mass% of Si, the remaining portion being Zn and unavoidable impurities, and the Ni content in the unavoidable impurities is 0.010 mass% or less with respect to the total mass of the plating film.