SURFACE-TREATMENT GALVANIZED STEEL SHEET, AND ADHESIVE JOINT USING THE SAME

• Main Authors: TATSUMI AKIHIKO, IBANO AKIRA
• Format: Patent
• Language: English; Japanese
• Published: 15.03.2018
• 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

PROBLEM TO BE SOLVED: To provide a surface-treatment galvanized steel sheet capable of reducing adhesion intensity change before and after wetting, in an adhesive joint using a galvanized steel sheet as an adherend.SOLUTION: A surface-treatment galvanized steel sheet includes a galvanized steel sheet, a chemical conversion coating and an adhesive layer in this order, in which the chemical conversion coating contains colloidal silica and a thermosetting resin, and the adhesive layer contains an adhesive having shear strength of 20 MPa or higher.SELECTED DRAWING: Figure 1 【課題】溶融亜鉛めっき鋼板を被着体とする接着継手において湿潤前後の接着強度変化が小さくできる、表面処理溶融亜鉛めっき鋼板を提供すること。【解決手段】本発明に係る表面処理溶融亜鉛めっき鋼板は、溶融亜鉛めっき鋼板、化成処理皮膜および接着剤層をこの順に備え、前記化成処理皮膜がコロイダルシリカと熱硬化型樹脂とを含むこと、並びに、前記接着剤層が、２０ＭＰa以上のせん断強度有する接着剤を含むことを特徴とする。【選択図】図１