Polyester powder coating is should protect aluminium, providing a long-lasting, tough coating. When this happens, despite its powder coating, aluminium can start to corrode. However, there are conditions and circumstances where powder coatings can fail. Unlike rust with steel or iron, this form of corrosion is non-destructive to aluminium, but the oxidation process leaves the metal surface looking unattractive.Īpplying polyester powder coatings protects aluminium surfaces from corrosion. ![]() This process will only stop once all the atoms in the aluminium have bonded with oxygen. When this occurs, a hard, white-coloured skin forms on its surface. The atoms in metal bond with oxygen, gradually breaking down.Īluminium is prone to corrosion because it oxidises faster than steel. The most common form of corrosion involves the oxidisation of metal surfaces in reaction to various agents. However, as a form of corrosion, rust only applies to iron and its alloys, such as steel.Ĭorrosion is a natural process that comes from a chemical reaction between materials and their environment. The surface of rust is flaky and offers no protection to the surface underneath. Over time, an iron mass can convert to rust completely, causing it to disintegrate. It’s an iron oxide that forms from a reaction between iron and oxygen when water and air moisture are present. ![]() Therefore, the short answer is that powder-coated aluminium doesn't rust, but it can corrode if the powder coating fails Rust and Corrosion: What’s the Difference? If you apply powder coating to aluminium surfaces, this will help to protect them from corrosion.īut although powder-coating provides long-term durability, it is not completely invincible to the impact of the elements.
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