RESEARCH ON HEAVY DUTY ANTI-CORROSIVE PAINTING APPLIED TO NEWLY-BUILT STEEL BRIDGE OF EXPRESSWAYS

Abstract

In this research, about 2000 painted specimens have been exposed at 4 different corrosive areas since 1988. From the result of this exposure test for 6 years, performances of heavy duty anti-corrosive paintings for newly-built steel bridges were mainly investigated. As a result, corrosion rates of 4 exposure areas were found to differ greatly each other mainly caused by the differences of environments. Appearances of corrosion such as areas, average depths and steel weight reductions were also found to differ greatly in each exposure area. In addition, performances of paintings against corrosion were also found to be influenced strongly by the kind of paint system in addition to the difference of the climate.