Anodising of aluminium is an electrolytic surface treatment process where the work is made anodic in a acid solution. This is normally sulphuric acid, but this can be replaced with other acids for specialised coatings. The process is unlike other finishing methods. Where most processes coat the surface with an organic or inorganic deposit, anodising is a conversion of the base material itself to form a protective oxide coating.
Powdercoating is an organic coating method which uses a coating material in the form of a fine powder. The main difference between a conventional liquid paint and powdercoating is that the powdercoating does not require a solvent to keep the binder and filler parts in a liquid suspension form. This powder is applied using high voltage, electrostatic guns that impart a static charge to the powder, allowing it to stick to the components. The powder film is then baked at around 200°C, where the powder melts and the curing occurs, forming a paint ‘skin’ on the product.
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It is often said that E-coating (also known as electrophoretic coating) is one of our industry’s most efficient coating methods. The process allows parts to be uniformly coated in seconds with tough, chemically resistant materials. These coatings are deposited from a water-based solution using a high voltage DC charge. The process coats all wet surfaces with a highly corrosion resistance surface finish that is unlike any other finishing process. The automotive industry has long been a user for the undercoating of car bodies and it is largely responsible for eliminating rust in modern vehicles.
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