Marine Coatings / Anti-Corrosion Materials

<b>Marine Coatings / Anti-Corrosion Materials</b> Wind, weather and sea affect the ship. Metallic parts tend to corrode and the deck can become slippery due to water and possibly ice. In this respect, requirements must be made with regard to corrosion protection for reasons of occupational safety and the protection of passengers and the ship. Corrosion protection is understood to mean all measures that prevent corrosion (damage to a material on the surface through chemical attack, e.g. through oxidation or electrochemical decomposition of the metal). An effective corrosion protection of the underwater hull consists of a coating - passive corrosion protection - and a cathodic protection with galvanic sacrificial anodes or impressed current anodes - active corrosion protection. Individual steel components are also hot-dip galvanized for corrosion protection. This protects them in two ways: on the one hand through the effect of the active cathodic corrosion protection, on the other hand the component is shielded against water and oxygen through the complete coating. The underwater hull and the surface hull are not only painted for visual reasons. The painting or the coating prevents the electrolyte water and oxygen from touching metal. Metallic zinc is often found in the synthetic resin-based paints. In this way, both protection principles are combined: active protection through cathodic corrosion protection and passive corrosion protection through barriers for water and oxygen. To protect the ballast water tanks against corrosion, one or two layers of a two-component epoxy resin coating are used. The coating of the cargo holds depends on the cargo to be brought in; the coating materials must be correspondingly resistant to the cargo. Here, either chemical resistance (chemical tanker or dangerous goods freighters) or resistance to mechanical stress (e.g. bulk freighters) is paramount.