Coated steel with chemical conversion treatment coating and manufacturing method thereof

• Main Authors: KINOSHITA YASUHIRO, MOTOHIRO TENMAYA, NOBUKI YOSHIZAKI
• Format: Patent
• Language: Chinese; English
• Published: 25.02.2020
• 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

The steel material of the present invention has a chemical conversion coating and is used when powder epoxy resin coating requiring high corrosion resistance and adhesion is used, or when powder epoxyresin is used as a primer and a coating adhesive or polyolefin resin is laminated. An oxide coating layer (2) containing zirconium or titanium is formed on the surface of the steel material (1) as abase treatment layer, and a porous coating layer (3) is formed thereon, the coating layer (3) has a structure formed by connecting iron oxide and fine particles mainly composed of linear fine-grainedsilica to impregnate the paint applied to the upper portion to enhance adhesion. 本发明的钢材是在要求高的防蚀性和密合性的粉体环氧树脂涂装、或以粉体环氧树脂作为底漆并且层叠涂装粘接剂、聚烯烃树脂时使用的具有化学转化处理被膜的钢材，在钢材(1)表面形成有含有锆或钛的氧化物被膜层(2)作为基底处理层，在其上形成有多孔状的被膜层(3)，所述被膜层(3)通过以铁氧化物和线状的微粒二氧化硅为主的微粒连结而成的结构，使涂装于上部的涂料浸渗而能强化密合性。