Page 36: of Maritime Reporter Magazine (March 2002)

Coatings & Corrosion Control j

Antifouling Paint Helps USCG Sink Maintenance Costs

The United States Coast Guard (USCG) has reduced maintenance costs by minimizing the time spent on ship bottom refurbishing, with the help of E

Paint Company of East Falmouth, Mass.

E Paint SN-I coating provides USCG vessels with well-balanced control over a wide array of common soft and hard fouling species. Vessels coated with E

Paint SN-1 solventborne antifouling paint can operate for up to two years before they must be hauled, pressure- washed and repainted. This is longer than is possible with virtually all approved non-metallic biocide antifoul- ing paint. Extending the interval between maintenance significantly reduces vessel downtime.

This combination of efficacy and min- imal threat to the environment is achieved by a dual-action biocidal sys- tem that combines E Paint's patented photoactive technology and a booster biocide. The system keeps ship bottoms smooth and clean without leaching harsh toxicants, which persist in the environment. "Sunlight and water are photochemi- cally combined by our paint to produce hydrogen peroxide, a potent antiseptic, on the paint's surface," said Christine

Greene, Sales and Marketing Director at E Paint Company. "The hydrogen peroxide constantly bleaches the hull, discouraging the accumulation of foul- ing organisms. While discouraging the settling of a wide variety of fouling organisms, hydrogen peroxide has the additional benefit of decomposing into oxygen and water. The booster biocide works in combination with the photoac- tive surface and is required in warm water environments, which are particu- larly congenial to the growth of foulants. To qualify for this role, a bio- cide must be very effective against both hard and soft fouling species, especially algae, and should not present any undue hazard to the aquatic environment."

To meet these requirements, E Paint

Company chose SEA-NINE 211. an isothiazolone biocide specifically devel- oped by Rohm and Haas Company for use in heavy-duty antifouling paints.

SEA-NINE 211 biocide controls such fouling organisms as algae, bacterial slime, barnacles, tunicates, tubeworms, bryozoa and diatoms. Equally signifi- cant, SEA-NINE 211 biocide provides excellent performance while posing a minimal long-term environmental threat. SEA-NINE 211 compound degrades very rapidly in seawater, binds to sediment instead of remaining in the water, and does not accumulate in the tissues of marine animals. Because of the environmentally-positive perfor- mance features of SEA-NINE 211 ' ioi

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Maritime Reporter & Engineering News

E Paint SN-1 antifouling paint has been applied to the aluminum hull of the

Safe/Sea Salvor, a new state-of-the-art, 33-ft. (10-m) rescue/tow boat.