ZINC INORGANIC SILICATE COATINGS:FIVE YEARS MARINE ATMOSPHERIC EXPOSURE

摘要

Ten zinc inorganic silicate coatings were exposed for 5 years at the three atmospheric environmental test sites of the Naval Civil Engineering Laboratory. These test sites are Kwajalein, Marshall Islands; Kaneohe, Hawaii (both tropical environments); and Port Hueneme, California. The zinc inorganic silicate coatings were exposed with and without topcoats. It was found, that in general, postcuring and superior self-curing zinc inorganic silicate coatings without topcoats will give long-term protection to steel. A compatible topcoat will improve the protective properties, especially of an inferior zinc inorganic silicate coating. Compatible vinyl, epoxy, or alkyd coatings are effective topcoats for the zinc inorganic silicate coatings.