The application of underwater coating to steel piles is generally not recommended. If used, the procedure requires thorough cleaning of the steel both above and below the waterline. The coating must be applied within 72 hours (less for warm tropical waters) of cleaning to ensure that marine growth has not reformed.
Manufacturer's recommendations need to be carefully followed. Epoxy and polyamide coatings will be sensitive to water temperature. Water temperatures above 70°F are desirable. The materials are generally unusable at temperatures below 55 °F.
The use of underwater coatings involves the application of hazardous materials.
MSDS on all materials will need to be obtained from the manufacturer along with their recommended handling procedures. The necessary environmental permits or letter of permission will need to be obtained as described in Section 1.4.4.
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