Biofouling, or biological fouling, is the accumulation of microorganisms, plants, algae, or crustaceans on wet surfaces that have a mechanical function, causing structural or other functional deficiencies. Left unchecked, the resulting build-up can cause corrosion¹ and impact operational efficiency – a heavily fouled ship hull can result in powering penalties of up to 86% at cruising speed; even relatively light fouling by diatom ‘slimes’ can generate a 10–16% penalty².

IMI’s naval marine valves play a vital role in various applications, including weapons handling, where precise control and reliability are paramount. Preventing biofouling will help increase fleet availability while reducing maintenance and operational costs and ensuring seawater mechanical systems operate without impedance.

IMI has a long history of developing technological advancements and, working with technology partner Sonihull, now offers a commercially proven solution to tackle biofouling for the naval marine market, both in dock and during operations.

With over 30,000 antifouling solutions from Sonihull already installed on commercial ships, the ultrasound-induced non-inertial agitation solution disrupts the biofouling process and actively prevents barnacle and mussel attachment. The system is an ideal alternative to harmful biocides, which are increasingly being restricted by new environmental legislation³.