GLARE-PROOF HOT DIP Zn-BASED PLATED STEEL SHEET AND PRODUCTION METHOD THEREOF

• Main Authors: TSUJIMURA TAKAO, HATTORI YASUNORI
• Format: Patent
• Language: English; Japanese
• Published: 05.11.2015
• 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

PROBLEM TO BE SOLVED: To provide a plated steel sheet having appearance of less surface roughness and less glossiness.SOLUTION: Gas phase including oxygen of 40% in cubic volume, and water or water solution, are sprayed by a two-fluid nozzle on a surface of a plating layer which is not solidified, after adjusting coating weight of hot dip plating. By using this method, a plated steel sheet is formed on a surface of a plating layer of a hot dip Zn-based plated steel sheet which has a surface rough shape of 60 degree glossiness specified in JISZ8741 of less than 150, and a maximum roughness specified in JISB0601('01) of less than 10 μm, and which includes Mg:0.2 to 6.0 mass% and Al:1.0 to 22.0 mass%, and a remainder is composed of Zn and an inevitable impurity. 【課題】より表面の粗さが小さく、かつ光沢度の低い外観を有するめっき鋼板の提供。【解決手段】溶融めっき付着量の調整後、まだ凝固していないめっき層の表面に、酸素を４０体積％以上含む気体と、水又は水溶液を、２流体ノズルを用いて噴霧する方法を用いて、ＪＩＳ Ｚ ８７４１に規定される６０度鏡面光沢度が１５０未満で、かつＪＩＳ Ｂ ０６０１（'０１）に規定される最大粗さが１０μｍ未満となる表面凹凸形状を有し、Ｍｇ：０．２〜６．０質量％，Ａｌ：１．０〜２２．０質量％を含有し残部がＺｎ及び不可避的不純物からなる防眩性溶融Ｚｎ基めっき鋼板のめっき層表面上に形成することによって達成される。【選択図】なし