Powder coating is a finishing process in which a coating is applied electrostatically to a surface as a free-floating, dry powder before heat is used to finalise the coating. Powder coating is a finishing process that yields a thick hard finish that is tougher than conventional paint.
The process of powder coating starts with the preparation of the tapware to be powder coating. Firstly the tapware is cleaned to ensure the removal of any debris and oil which can inhibit the attachment of the dry powder. Next, the dry powder is applied electrostatically – a process by which the particles of the powder and the object are charged through a high voltage electrostatic surge. This electrostatic stage of powder coating greatly increases the efficiency and productivity of the coating process as less paint is wasted and the metal object is fully coated.
The sprayed powder coating is then cured at temperatures as high as 400 degrees for ten minutes so that the finish can set onto the object. While setting, the powder melts and flows around the object. The heat not only melts the powder but binds the polymer into a heavier polymer that bonds in a tight network-like finish. The curing not only coasts the sheet metal product but it also binds the polymer into a tighter heavier finish.
The benefits of the process of powder coating are numerous. Due to the dense finish on the tapware, it ensures it is more durable and longer lasting than conventional painting. Secondly powder coating is a thick one coat finish so the process is quite easy. Also, powder coating creates even surfaces.