SURFACE-TREATED STEEL PLATE

• Main Authors: KOGA ATSUO, TOSHIN KUNIHIKO, UEDA DAICHI, KAWAMURA YASUAKI
• Format: Patent
• Language: English; Japanese
• Published: 08.03.2023
• 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; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; PERFORMING OPERATIONS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING

To disclose a surface-treated steel plate with improved corrosion resistance by restraining blister on a coating film in a warm saline water immersion test.SOLUTION: A surface-treated steel plate has a plating steel plate having a zinc-containing plating layer, and a surface treatment layer provided on at least one main face of the plating steel layer. The surface treatment layer has a coating film, and the coating film contains binder resin, an anti-rust agent, and a conductive agent. An adhesive amount of the coating film is 2 g/m2 or more and 30 g/m2 or less, and electric conductivity of immersion water obtained when a predetermined ion exchange water immersion test is performed to the surface-treated steel plate is 10 μS/cm or more and 25 μS/cm or less.SELECTED DRAWING: None 【課題】温塩水浸漬試験において塗膜におけるブリスターの発生を抑制して耐食性が高められた表面処理鋼板を開示する。【解決手段】亜鉛含有めっき層を有するめっき鋼板と、前記めっき鋼板の少なくとも一方の主面に設けられた表面処理層と、を有する、表面処理鋼板であって、前記表面処理層が、塗膜を有し、前記塗膜が、バインダー樹脂と、防錆剤と、導電剤と、を含み、前記塗膜の付着量が、２ｇ／ｍ２以上３０ｇ／ｍ２以下であり、前記表面処理鋼板に対して所定のイオン交換水浸漬試験を行った場合に得られる浸漬水の電気伝導度が、１０μＳ／ｃｍ以上２５μＳ／ｃｍ以下である、表面処理鋼板。【選択図】なし