What is powder coating?
Powder coating is by far the youngest of the surface finishing techniques in common use today. It was first used in Australia about 1967. Powder coating is the technique of applying dry paint to a part. The final cured coating is the same as a 2-pack wet paint. In normal wet painting such as house paints, the solids are in suspension in a liquid carrier, which must evaporate before the solid paint coating is produced. In powder coating, the powdered paint may be applied by either of two techniques. • The item is lowered into a fluidised bed of the powder, which may or may not be electrostatically charged, or • The powdered paint is electrostatically charged and sprayed onto the part. The part is then placed in an oven and the powder particles melt and coalesce to form a continuous film. There are two main types of powder available to the surface finisher: • Thermoplastic powders that will remelt when heated, and • Thermosetting powders that will not remelt upon reheating. During the cu
Powder coating is a special colouring technique which is mainly used on metal as an excellent way to not only colour but provide a very tough protective coating to the metal part. It is sprayed onto the part as a free-flowing dry powder. The main difference between a conventional liquid paint and a powder coating is that the powder coating does not require a solvent solution to keep the colour in a liquid form, instead it is spray applied electrostatically using the dry powder. The coating is then baked in an oven to cure it under heat. This allows it to flow and form a hard skin over the surface of the iron. This process can look very unusual to someone who has never seen it before as the dry powder is usually nearly always white in colour, baking it changes its chemical composition and it changes colour before your eyes to the final colour you want, as it enters the oven. It is used to create a hard finish that is tougher than conventional paint. Powder coating is mainly used for coa
