Evaluation of Protective Coatings Systems for Buoys.

摘要

Thirty-one premium antifouling marine coatings systems have been examined to determine their extended service life potential for steel, aluminum, and plastic buoys. Complete systems of substrate, pretreatments, primers, anticorrosive midcoats, and antifouling topcoats containing various toxicants are included in the program. Eight of the 31 systems are carried over from a previous study (Report No. CG-D-74-75 of March 21, 1975) and have been examined after 77 months of static immersion in seawater near Daytona Beach, Florida. The performance of seven systems is noteworthy, particularly that of the Vinyl-High Rosin Type 121/63 and the elastomeric sheet with organotin toxicant. Performance of the Standard Vinyl Rosin Type 121 in the specification system and over self-cured and post cured zinc silicates with a high build vinyl are slightly poorer but are still rated excellent. The remaining systems are epoxy/epoxy-coal tar and a vinyl rosin containing an organotin fluoride toxicant.