Advanced Non-Toxic Silicone Fouling-Release Coatings
Abstract
This Environmental Security Technology Certification Program (ESTCP) project demonstrated and validated the use of the duplex silicone fouling-release coating system developed by the Naval Research Laboratory (NRL), for use on boat hulls and power plant cooling water intake tunnels as a replacement for toxic copper antifouling paints. The ESTCP program team (which comprised General Electric Company (GE), Naval Surface Warfare Center, Carderock Division (NSWCCD), Florida Institute of Technology, State University of New York (SUNY), and Bridger Scientific) carried out thirteen full-scale field applications of the duplex system to meet specific performance objectives for an acceptable replacement antifouling coating system. The duplex coating system was evaluated in cold, temperate and tropical environments in fresh, brackish and marine waters on static and dynamic platforms. Fouling extent, type, and ease of removal were assessed, as well as the effect of hull cleaning on subsequent boat engine performance. The duplex coating system was shown to be highly durable and easily cleanable with a water jet. To date, successful service life of over three years has been achieved. While some instances of delamination or abrasion did occur, a coating repair package was developed to easily rectify them. Projected operating and maintenance costs associated with using the new silicone-based coatings are comparable with those for the conventional antifouling paints being replaced. However, overall projected savings to the U.S. Navy are $35-50 million per year through 10-15% reduction in fuel consumption. The power plant demonstrations were extremely successful, with the coatings remaining in good condition and continuing to be 99% effective against zebra mussels. Consumer Power has saved $10-20,000 annually through avoidance of cleaning costs.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1999
- Accession Number
- ADA607451
Entities
People
- James Cella
Organizations
- General Electric