Abstract
In order to establish anti-corrosive coating technologies in cold regions, exposure tests and actual bridge tests on performance not only of coating systems specified in steel bridge coating manuals, but also of ultra-thick film coating systems, including coatings for frozen sea and heavy-duty anti-corrosive paints developed for cold regions, were conducted. The results of 10-year exposure tests and 8-year actual bridge tests showed that a coating system in which zinc-rich paints were used as primer and epoxy+polyurethane or fluorine-contained resins were applied had excellent corrosion resistance; the ultra-thick film coating systems, if top coats with excellent weather resistance were applied, is promising as a heavy-duty anti-corrosive coating system; and phthalic and chlorinated rubber paints were unsuited for cold regions because clacking and peeling occurred at early age.
