| Summary: | Coupons of hot rolled carbon steel plates measuring 100 mm × 100 mm × 4 mm, containing 0.16% C, 0.08% Si and 0.35% Mn, were cleaned by wire brushing or sand blasting. The coupons were coated with five different, commercially available paints and coats, and then exposed to the marine atmosphere of the campus of the College of Marine Sciences, King Abdulaziz University in the City of Abhur for more than four years. The coats investigated involved a water-base corrosion inhibitor, a rust converter with metal primer, a two-pack epoxy paint, a high solids-epoxy coating, and a two-pack aliphatic acrylic polyurethane. The performance of the various coats was examined frequently and compared with that of hot-dipped-galvanized steel. The results showed that the polyurethane coat was superior to the others, and that was followed by the galvanized coat.
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