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 excellent weldability and corrosion resistance.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 chemical conversion treatment layer and a coating film, and the coating film contains binder resin, an anti-rust agent, and a conductive agent. The chemical conversion treatment layer is in contact with the plating steel plate, and a ratio Tmax/Tmin of Tmax and Tmin measured under a predetermined condition using EPMA is 2.0 or more and 8.0 or less.SELECTED DRAWING: Figure 1 【課題】溶接性及び耐食性に優れる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、化成処理層と塗膜とを有し、前記塗膜が、バインダー樹脂と、防錆剤と、導電剤と、を含み、前記化成処理層が、前記めっき鋼板に接し、ＥＰＭＡを利用して所定の条件で測定されるＴｍａｘとＴｍｉｎとの比Ｔｍａｘ／Ｔｍｉｎが２．０以上８．０以下である、表面処理鋼板。【選択図】図１