COATING METHOD OF POLYMER CEMENT PREPARED FOR STEEL STRUCTURE

摘要

PURPOSE:To prevent the generation of red rust and to enhance the adhesiveness of polymer cement, by removing mill scale from the glassy surface of a steel structure, treating the mill scale-removed surface with a primary anticorrosive composition and then coating the treated surface with the polymer cement. CONSTITUTION:After mill scale is removed from the glassy surface of a steel structure, a primary corrosion-inhibitor, e.g. a phosphoric, manganese phosphate, zinc phosphate or ferrous phosphate-type corrosion-inhibiting liquid, is applied onto the mill scale-removed glassy surface. The surface is then held as such 2hr or longer under an ordinary temperature atmosphere, and coated with a predetermined polymer cement mortar. The metal-coordination compound of phosphoric acid or the like with ethylenediamine tetracetic acid having ligands of 4-6 coordination numbers its salt or the like, dissolved in alcohol or water, may be used as the said corrosion-inhibitor.