|Project leader||Laboratoire MAPIEM/USTV|
|Industrials partners||DCNS, Blancolor|
|Budget||2 000 K€|
|Cofinanceur publics||FUI (Single Interministerial Fund), regional authorities|
|Year of labeling||2006|
|Year of co-financing||2006|
Any surface immersed in seawater rapidly becomes covered with marine growth, which has both an environmental and an economic impact. More frequent maintenance of ship hulls entails additional costs and slower boat speeds cause excessive fuel consumption.
There are nearly 4,000 different species of marine biofouling known to colonize submerged surfaces. The method used most currently to fight against their attachment to the hull of a ship is the application of marine antifouling paint. During the 60s and up until the 80s, these paints were unfortunately extremely toxic to non-target organisms. Today the challenge is to find an equivalent to existing paints, while limiting their harmful effects on the environment. In this project work focused on antifouling paints known as "self-polishing". These paints are effective against biofouling due to the active biocide substances they contain.
These are gradually released through controlled erosion of the coating in the marine environment. Therefore the biocides used must be effective whilst being the least toxic possible. The strategy which is to be implemented revolves around several different points:
- Promote effective hydrodynamic performance by reducing the coefficient of friction of the coating (better gliding on the water).
- Reduce or eliminate toxic biocides in the coatings
- Reduce or eliminate the organic solvents by developing water based paints. There are currently very few on the market and only for leisure boating purposes.
- Assess the potential of new active substances (little or no toxicity)
- Promote effective hydrodynamic performance by reducing the friction coefficient of the coating (better gliding on the water).