Technology behind CAT

Antifouling paints are commonly used to maintain the performance and durability of ships. For decades, antifouling paints have mainly adopted copper or zinc as a major biocide to reduce marine organism adhesion, yet, it is highly toxic to marine ecosystems and foodchain. Our recent measurements show that the concentration of heavy metal in the sediment exceeds the international permissible limit by 60 times. With this in mind, Nano-MAP is designed to fully replace heavy metal-based antifouling paints.

Nano-MAP contains anion-doped semiconductor metal oxide. Upon activation by the solar radiation in seawater, Nano-MAP induces photocatalytic oxidation and superhydrophobicity. These effects can deter unwanted growth of barnacles, tubeworms and mussels on the hull. In addition, the nanomaterials are modified by co-doping to achieve solar photocathodic effect. As a result, a single protective coating possesses bifunctional properties for antifouling and anticorrosion protection.

Nano-MAP is 100% safe to use and does not adversely affect the marine ecosystem. The superior performance of the Nano-MAP can save fuel by 30-40% and reduce maintenance workload significantly.

With the presence of Nano-MAP, any biofoulant attached can be easily removed with gentle brushing. The payback period is typically one year or shorter.