METAL-SURFACE TREATMENT AGENT, SURFACE-TREATED STEEL MATERIAL, SURFACE TREATMENT METHOD THEREFOR, COATED STEEL MATERIAL AND PRODUCTION METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a chromate-free metal-surface treatment agent which is most suitable for metal, particularly for a metal-coated steel material, free from chromium, and can impart excellent workability, adhesiveness and corrosion resistance to the metal when used as pretreatment for the coating of paint or the like; a surface-treated steel material which is surface-treated with the treatment agent and a surface treatment method therefor; and a coated steel material having an upper layer coating thereon and a production method therefor.;SOLUTION: The metal-surface treatment agent includes a silane coupling agent containing a coordinating functional group as an indispensable component, and is formed by dissolving the silane coupling agent in water and/or an organic solvent.;COPYRIGHT: (C)2013,JPO&INPIT