Solventless
Seawater Ballast Tank Coating Systems
(Naval Sea Systems Command, Materials Engineering)
Project Number: S-98-OC-010
NAVSEA,
with the support of the JG-PP,
demonstrated solventless edgewrap coating systems technologies for Navy
ship/submarine tanks and well deck overheads. These coating systems (Sigma
Coatings Sigmaguard BT (control), Sigma Coatings Edgeguard, Sherwin-Williams
Dura-Plate UHS and Jotun 591) meet the new low-VOC/HAP
content requirements. These selected coating systems will be used in critical
shipboard applications such as in seawater ballast tanks and well deck
overheads. There are several factors which contributed to the short service
life of the old tank coating systems, the most common being poor surface
preparation which lead to surface contamination and moisture condensation.
Other factors included poor control of environmental conditions during
surface preparation and paint application, poor coating coverage and poor
quality control.
The initial CBA suggest millions in cost savings for the Navy during the next 20 years through the use of the new, high-solid, low-VOC ballast tank coating system. The Navy will achieve these savings by avoiding the cost (e.g., labor, materials, hazardous waste disposal, etc.) associated with the current 5-7 year cycle for ballast tank painting and going to a cycle of over 20 years with the new, high-solids systems. In addition to these benefits, the Navy will also reduce VOC emissions from ballast tank coating operations through the use of inherently low-VOC coatings and by reducing the number of recoat cycles from three cycles to one cycle for a 20-year period.
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This site last updated April 3, 2008.
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