COATED STAINLESS STEEL PLATE EXCELLENT IN CORROSION RESISTANCE UNDER ENVIRONMENT OF AUTOMOBILE EXHAUST GAS, CHLORIDE AND STONE BOUNCE

摘要

PURPOSE: To produce a coated stainless steel plate not causing an iron rust from a base plate under a formularized environmental condition in a tunnel by providing respective three layers of specified coating films using a Cr- containing stainless steel plate as a base plate and using an oligopolyester (meth)acrylate film as a lowermost layer. CONSTITUTION: The stainless steel plate containing >=13% Cr is used as the base plate. A thermosetting coating film having a compsn. consisting of an oligopolyester (meth)acrylate is provided as the lowermost layer, and the thermosetting coating film having <=65 deg.C Tg (glass transition point) is provided thereon, and the layer containing the oligopolyester (meth)acrylate is cured by an electron beam irradiation, etc., to provide the coating film having >=500MΩ.cm<2> ion permeation resistance. An environment in the tunnel expressed by each of the formulae: 3.0×10<-4>×45/ (tunnel width (m))×(tunnel hight (m))}×(A)×(B)×(traffic volume (the number of cars/day)/(frequency of cleaning (the number of times/year))}×365<=300 and (traffic volume (the number of cars/ day))×45/ (tunnel width (m))×(tunnel hight (m))}×(C)<=20000 is provided.