Definition - What does Anechoic Coating mean?
An anechoic coating is a protective fluid film layer that is applied on a metal's surface via painting or spraying to protect the metal from exposure to a moisture-rich environment. Anechoic coatings are composed of rubber or synthetic polymers. Anechoic coatings are a viable option to prevent marine corrosion.
Corrosionpedia explains Anechoic Coating
Anechoic coatings are mostly used in water applications such as marine exploration, submarine construction and underwater housing vessels. They are sometimes applied to a submarine's exterior surface to reduce the ship's acoustic signature.
Due to the water-repellent characteristic of anechoic coatings, they are ideal for reducing the moisture level on metallic surfaces and the moisture vapor transmission rate. A coating with a high moisture vapor transmission rate performs poorly as a preventive layer because it allows moisture to seep through and react with the metallic surface, ultimately causing corrosion, degradation and weakening of the surface. Protective coatings with a low moisture vapor transmission rate are advisable for preventative applications.