Metal surface treatment agent, surface treated steel material and surface treatment method thereof, and coated steel material and method for producing the same

摘要

The present invention relates to a metal surface treatment agent, a surface treated steel and a surface treatment method thereof, and a coated steel and a making method thereof. The chromate-free metal surface treatment agent is most suitable for being used as a metal coated steel, as the pre-processing of the coatings, such as the paint, etc., and can provide the excellent processability, adaptation and corrosion resistance. The metal surface treatment agent takes the organosilicon compounds represented by the general formula (1) as the necessary components, wherein R is hydrolytic perssad, R' is alkyl group having 1-4 carbon atoms, A is a linear chain or branched chain alkylene having 1-8 carbon atoms, X is one of the oxygen atom, the sulphur atom and the nitrogen-atom, R1 and R2 independently and separately represent the hydrogen atom, the alkyl group having 1-20 carbon atoms, the fluoroalkyl having 1-20 carbon atoms, aryl having 6-10 carbon atoms and alkenyl having 2-10 carbon atoms, or the substituent group represented by the general formula (2), m is an integer of 1-3. In the general formula (2), R' is the alkyl group having 1-4 carbon atoms, B is a linear chain or branched chain alkylene having 1-8 carbon atoms, and m is an integer of 1-3.