POLYMER-COATED STEEL MATERIAL HAVING OUTSTANDING RUST AND CORROSION PROOF PERFORMANCE

摘要

PROBLEM TO BE SOLVED: To provide a polymer-coated steel material having outstanding rust and corrosion proof performance. SOLUTION: This polymer-coated steel material has a coated layer consisting of a primer layer and a polymer resin layer, laminated on the surface of a steel material. The primer layer is formed by curing a primer composition composed mainly of an epoxy resin and an epoxy resin curing agent. In addition, this material is characterized in that the primer layer shows an oxygen permeability constant of 0.2 cc-mm/m2/day/atm or less at 23°C and a relative humidity of 60%RH. COPYRIGHT: (C)2004,JPO