HOT-DIP Al-Zn-Si-Mg BASED PLATED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME

• Main Authors: YOSHIDA MASAHIRO, SUGANO FUMITAKA, IWANO SUMIHISA, SATO YOHEI, TAIRA SHOICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 26.09.2022
• Subjects: ALLOYS; 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; FERROUS OR NON-FERROUS ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF ALLOYS OR NON-FERROUS METALS

To provide a hot-dip Al-Zn-Si-Mg based plated steel sheet stably excellent in corrosion resistance.SOLUTION: A hot-dip Al-Zn-Si-Mg based plated steel sheet including a plating film having a composition including Al:45 to 65 mass%, Si:1.0 to 4.0 mass%, Mg:1.0 to 10.0 mass% and a balance consisting of Zn and inevitable impurities. A Ni content in the inevitable impurities is 0.010 mass% or less to the total mass of the plating film.SELECTED DRAWING: None 【課題】安定的に優れた耐食性を有する溶融Al-Zn-Si-Mg系めっき鋼板を提供する。【解決手段】上記目的を達成するべく、本発明は、めっき皮膜を備える溶融Al-Zn-Si-Mg系めっき鋼板であって、前記めっき皮膜は、Al：45～65質量％、Si：1.0～4.0質量％及びMg：1.0～10.0質量％を含有し、残部がZn及び不可避的不純物からなる組成を有し、前記不可避的不純物中のNi含有量が、前記めっき皮膜の総質量に対して0.010質量％以下であることを特徴とする。【選択図】なし