FOUL RELEASE

Protection of Ships
Lecture 1: Corrosion
Lecture 2: Antifouling
Lecture 3: Foul Release
Colin Anderson
(Technical Director, International Paint, Yacht-USA)
There are four main TBT free fouling control technologies currently available:
Biocidal:
–Self-polishing Copolymer (SPC)
–Hybrid SPC
–Controlled Depletion Polymer (CDP)
Foul Release
These technologies have :
–Differing effects on roughness
–Differing abilities to resist fouling.
No Biocides
Low surface energy (surface tension)
Ultra-smooth, slippery surface
Chemically durable
A study was initiated to see whether the extra smoothness of theFoul Release coating Intersleek 700 reduces drag.
–Part 1: Using the Newcastle (UK) Towing Tank (40 m)
–Part 2: Using the Madrid (Spain) Towing Tank (320 m)
The drag of an uncoated Flat Plane was compared to the drag withthe following coatings: IntersmoothSPC (BiocidalAntifouling) Intersleek 700 (Foul Release)
The Newcastle test used a 2m x 1m Flat plane, up to 2 m/s, whereas the Madrid test used a 6m x 1m Flat Plane, at up to 8 m/s.
The roughness of the three surfaces was also compared.
Conclusions:
Roughness: The freshly applied Foul Release coating Intersleek 700 was smoother than the freshly applied SPC coating.
Drag: The freshly applied Foul Release coating Intersleek 700 gave less drag than the freshly applied SPC coating.
Read Lecture 3 – Foul release