GALVANIZED STEEL PLATE AND PRODUCTION METHOD THEREOF

• Main Authors: HOSHINO KATSUYA, FURUYA SHINICHI, TAIRA SHOICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 30.05.2016
• 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 method for producing a galvanized steel plate having excellent press moldability stably even to a galvanized steel plate having high strength or a galvanized steel plate to which complicated molding is applied; and to provide a galvanized steel plate having excellent press moldability.SOLUTION: A production method of a galvanized steel plate includes a film forming step in which an acid solution containing a fluororesin is brought into contact with the surface of the galvanized steel plate and held for 1-60 seconds in this state, and then subjected to water washing and dehydration, to thereby form a fluororesin-containing film constituted of an oxide layer and/or a hydroxide layer.SELECTED DRAWING: None 【課題】高強度の亜鉛系めっき鋼板、複雑な成形を施される亜鉛系めっき鋼板に対しても安定的に優れたプレス成形性を有する亜鉛系めっき鋼板を製造する方法および優れたプレス成形性を有する亜鉛系めっき鋼板を提供する。【解決手段】亜鉛系めっき鋼板の表面にフッ素樹脂を含む酸性溶液を接触させた状態で１〜６０秒間保持し、その後、水洗、乾燥を行うことにより、酸化物層及び／又は水酸化物層から構成されるフッ素樹脂含有皮膜を形成する皮膜形成工程を備える亜鉛系めっき鋼板の製造方法を採用する。【選択図】なし