Powder coating Wikipedia the free encyclopedia.
The mixture is heated in an extruder. The extruded mixture is rolled flat cooled and broken into small chips. The chips are milled and sieved to make a fine powder. The powder coating process edit. The powder coating process involves three basic steps. Part preparation or the pre-treatment. Part preparation processes and equipment edit. Removal of oil dirt lubrication greases metal oxides welding scale etc. is essential prior to the powder coating process. It can be done by a variety of chemical and mechanical methods. The selection of the method depends on the size and the material of the part to be powder coated the type of impurities to be removed and the performance requirement of the finished product.