METHOD OF FORMING CORROSION PROTECTION COATING ON PRESTRESSED CONCRETE STRAND BY FORMING DOUBLE CORROSION PROTECTION COATING ON CORE WIRE AND SIDE WIRES AND PERFORMING BLASTING PROCESS AFTER FORMATION OF PLATING COATING

摘要

PURPOSE: A method of forming corrosion protection coating on prestressed concrete strand by forming double corrosion protection coating on a core wire and side wires and performing a blasting process after formation of plating coating is provided to achieve improved adhesion of resin coating to plating coating and corrosion protection performance of resin coating. CONSTITUTION: A method comprises a step of forming a plating coating(12) on the outer surface of an element wire(11); a step of wire drawing the element wire where the plating coating is formed; a step of forming a prestressed concrete strand constituted by core wire and side wires, by twisting and combining element wires; a step of temporarily unwinding the prestressed concrete strand, and performing a blasting process on the core and side wires; a step of forming resin coating on the outer surfaces of the blasted core and side wires; and a step of cooling the resin coating, and re-twisting and combining the prestressed concrete strand.