ANTICORROSION PROPERTIES OF ZINC-RICH COATINGS ON STEEL STRUCTURE IN CAO′E RIVER FLOODGATE

According to the environment in Cao′e River floodgate,seven zinc-rich coatings were selected as test samples to investigate their anticorrosion properties by tests of outdoor exposure in splash zone,tideland and atmospheric zone for about two years and outdoor tests such as salt fog test,cycle salt solution test and salt solution test for about 10500 h.Different zinc-rich coatings from different factories showed different properties.The anticorrosion properties of high zinc content coatings were better than those of low zinc content ones.It is necessary to perform validation test before applying anticorrosion coatings in engineering.