Paint composition for steel structure having steel bridge, and method for painting of steel structure using this same

The present invention, steel pipe bridges, steel bridges yukgo durability by giving to improve the adhesion between the steel structure surface of the primer coating applied to the steel structure of the on steel structures rehabilitation coating composition and steel coating method using the same that includes a steel bridge improving and zinc (zinc) delays the force corrosion of pidomul using a sacrificial anode effect, water resistance, light resistance through the middle for and the theft coating, the ozone resistance, weather resistance, the initial coating to improve durability by the time curing and the state for the purpose of maintaining. Steel structures rehabilitation coating composition comprising a steel bridge according to the present invention, a vinyl acetate copolymer (Vinyl acetate copolymer) 30 ~ 50% by weight of zinc (zinc) 10 ~ 20 weight% and diluted material 20 to 40% by weight and with respect to the subject 100 parts by weight consisting of a mixture of additives 10 to 15% by weight, adding an aliphatic or alicyclic or aromatic diisocyanate of 20 to 40% by weight and the diluted material 60 and curing agent 40 to 60 consisting of a mixture of 80% by weight of a mixture made of becomes primers used to steal for adhesion increase in the steel coating, a phenol novolak epoxy resin (phenol novolak epoxy resin) 10-30% by weight of bisphenol (bis phenol) a type epoxy resin 10 to 30% by weight of a polyfunctional reactive diluted material 5 to 10 parts by weight% and the ceramic filler 30 to 60% by weight and a matting agent, for sedimentation agent, a pigment, a defoaming agent subject 100 parts by weight of one or more mixture of additives 5-10% by weight of the amine resin, 40 to and 60% by weight And polyimide resin from 20 to 40% by weight and bisphenol A type epoxy 10 to 20% by weight of the curing agent 20 to intermediate coating, an acrylic polyol 50 to 70% by weight for being applied to the primer layer and 50 parts by weight is made of a mixture of steel consisting of a mixture of with respect to the subject 100 made of a mixture of diluted material 15 to 35% by weight and additives 10 to 20% parts by weight of a functional group and two or more isocyanate group content of yet 10-50% solids content is adjusted to 30 to 70% by weight alicyclic isocyanate curing agent is 20 to 50 parts by weight of a mixture composed of a coating material for forming the top coat layer the theft to the surface of the substrate.