A STUDY ON THE EFFECT OF COVER ANTICORROSIVE TECHNIQUE TO IMPROVE CORROSION ENVIRONMENT

Abstract

 A cover anticorrosion method is expected to have the effect of suppressing inflow of environmental factors from outside, and is an anticorrosion method capable of improving corrosion environment. However, there are few studies on evaluation of corrosion environment in enclosed girder space. In this study, a sandwich panel was attached to a steel plate girder bridge which is constructed in coastal area of subtropical zone, and corrosion environment in internal space is evaluated by measurement and analysis. In addition to evaluation of environmental factors such as salinity, temperature, humidity, time of wet and exposure test, thermal fluid simulation was carried out for dew condensation phenomenon observed sporadically on deck plate in internal space. Furthermore, exposure tests were conducted at vicinity of the bridge, and the environmental improvement effect of cover anticorrosion method was confirmed by comparing with the environment inside and outside the girder.