Europe. Researchers at fraunhofer's Institute for Material Mechanics (IWM) developed a new eco-friendly alternative in ship coatings that prevents corrosion.
The breakthrough refers to an electrochemically active coating system that regularly produces the change of pH values on the surface of the ship's hull. This prevents colonization without having to use biocides.
The large surface electrodes were painted in an insulating primer coating. The active electrochemical layer based on a sol-gel paint from NTC (nano technology coating GmbH), was modified by electrically conductive particles.
To achieve an adequate distribution of the electrolysis current, the researchers applied a highly conductive intermediate layer. In a pre-programmed and optimized electrochemical process, the electrolysis current is switched and interrupted periodically. A current density less than 0.2 mAcm-2 generates enough pH stress near the hull surface to prevent algae or crustacean farming. The electric current is supplied by a photovoltaic module or by the ground-based power grid.
The electrochemical antifouling agent by alternating pH values was developed and patented by the project partner GmbH. This principle is working effectively and independently in marine flora and seawater types.
Leave your comment