AN ELECTROLYTIC SYSTEM FOR CONTROLLING MARINE GROWTH AND CORROSION
During the past decade the system has been successfully employed to control biofouling and corrosion in the sea water systems aboard well over 100 ships and offshore structures. The system is electrolytic in action using special anodes fitted inside pipe inlets but, unlike other systems designed to prevent corrosion, only a very small current is employed. Slow dissolution of the anodes into electrolytic products creates an environment which is hostile to the primary forms of marine fouling, while corrosion is drastically reduced. A low D.C. current is applied to the anodes, releasing very low levels of aluminum (from the Trap Corrosion Anode) and copper (from the Marine Growth Anode), respectively. Any convenient cathode area can be employed. The sea water moving past the anodes, into the system to be protected, is the mixing agent and transport fluid. The aluminum hydroxide formed flocculates the released copper. This copper-aluminum hydroxide floc is carried through the system and, being highly gelatenous, tends to spread out onto the slower moving areas where marine growth larvae are most likely to settle. This process is continuous and cumulative throughout the system, although in fact the amount of copper and aluminum being released is extremely small....less than 2 mg/1 each. The cupro-aluminum film thus builds up to create a thin, non-heat-insulating, protective coating throughout the system being protected.
- Paper presented on 13 September 1979 to the Northern California Section, SNAME.
Society of Naval Architects and Marine Engineers601 Pavonia Avenue
Jersey City, NJ USA 07306-2907
- Blume, W J
- Publication Date: 1979
- Pagination: 15 p.
- TRT Terms: Anodic protection; Antifouling coatings; Cathodic protection; Corrosion; Corrosion protection; Economic analysis
- Old TRIS Terms: Antifouling systems; Sacrificial
- Subject Areas: Economics; Marine Transportation;
- Accession Number: 00319100
- Record Type: Publication
- Report/Paper Numbers: Conf Paper
- Files: TRIS
- Created Date: Oct 8 1980 12:00AM