Overcoating of Inorganic Zinc Primers for Underwater Service
OCEAN CITY RESEARCH CORP NJ
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The shipbuilding industry has directed much effort toward ways of limiting escalating coating costs. A major portion of coating costs may be attributed to surface preparation. During construction, steel plate is normally protected with an inorganic zinc pre-construction primer. For the underwater portion of the hull, this primer is usually removed by abrasive blasting prior to final coating of the hull. If the requirement for removing the pre-construction primer could be eliminated, there would be a significant cost savings. As a result, Avondale Shipyards acting on behalf of the Maritime Administration under the National Shipbuilding Research Program authorized the Ocean City Research Corporation to undertake a laboratory study investigating the performance of selected marine coatings when applied over inorganic zinc primers in underwater service. In general, the results of the study suggest that there are inorganic zinc pre-construction primers that can be overcoated for underwater service. The results encourage further tests to investigate the parameters affecting compatibility.
- Coatings, Colorants and Finishes
- Marine Engineering