Why is anti-fouling paint used?
Anti-fouling paint is used on boats to prevent biofouling, which is the growth of organisms such as barnacles, molluscs and algae on the hull of the boat.
Biofouling can increase friction resistance and cause drag which slows down the boat and reduces its performance. This results in higher fuel consumption which is an economic and environmental cost. Additionally, biofouling on a boat’s hull can harbor invasive species that harm local marine life. To mitigate these risks, regular drydocking and the application of anti-fouling paint is essential.
Modern anti-fouling paints contain metallic compounds that have been developed by the chemicals industry. The biocides in the paint gradually leach out into the water and create a toxic environment for organisms that attach to the hull. This helps to keep the hull clean and free from growth, reducing drag and increasing the boat's performance.