Corrosion Control of Inter-Hull Spaces.
1997
Kikuta, M. | Shimko, M. | Ciscon, D.
This report expands upon the work conducted by the U.S. Navy to develop a tank preservation protocol with a service life of 15 to 20 years. This report focuses on controlling corrosion in the region between the inner and outer hulls in new double hull designs. This area is treated as either a void or a seawater ballast tank. The Oil Pollution Act of 1990 has precipitated increased interest by ship owners, ship builders, ship operators, and classification societies to analyze and evaluate the long term corrosion protection requirements of the inter-hull space of double hull designs. A recommended inter-hull space preservation protocol is provided which is based upon information gathered from classification societies; U.S., European, and Japanese shipyards; coating manufacturers; maritime magazine articles; reports; and the U.S. Navy. Conclusions are provided concerning the use of cathodic protection, vapor phase inhibitors, and metal spray coatings. Guides were developed to evaluate whether to repair or replace the coating of inter-hull spaces; inspection of the coating of inter-hull spaces; quality assurance requirements for application of coatings to steel surfaces of inter-hull areas; and training of journeyman painters, painting supervisors, and paint inspectors for double hull ships.
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