Evaluation of New Surface Preparation and Coating Repair Techniques in Ballast Tanks
Abstract
Ship ballast tanks present special problems as concerns corrosion control. In addition, ballast tanks are one of the most costly areas in which to apply coatings in both new ship construction and ship maintenance. Being subjected to intermittent wet and dry cycles of aerated sea water places extreme demands on corrosion control methods. Harsh service environments are coupled with necessarily complex tank geometries, especially in Navy combatants where weight and hull designs dictate small, irregular tanks with difficult accessibility. The SP-3 Panel of SNAME recognized these problems and formulated a series of research and development projects to investigate alternate, cost effective corrosion control solutions. The first project began in 1980 and was entitled Cathodic Protection/Partial Coatings Verses Complete Coating in Tanks. A series of ballast tank mock-ups were constructed which duplicate ballast tank geometries. The tanks were also large enough to allow access for surface preparation and installation of the various corrosion control methods. The measures were not limited to protective coatings alone. Four approaches were originally selected for testing.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1990
- Accession Number
- ADA444484
Entities
Organizations
- National Steel and Shipbuilding Company