Powder Coating Process

 

Powder coating process is comparable to wet painting process in the sense that dry powder rather than liquid is used to paint and coat an object. The powder sticks to the foreign metal object via electrolysis which consists of grounding the metallic objects charging the powder and allowing the powdered particles to be electrostatic.

Substrates are to be used that can tolerate the heat of curing powder and that can be grounded to enhance electrically charged particle attachment.

The powder is attracted to the object which flows and cures during this application of heat.

Typical steps in a powder coating Process for metal parts

Making sure the object is fully cleaned and all excess dirt, grime, is taken off which makes sure the finish it spectacular. If in the event a metallic object is not cleaned then the powder will not combine to the metal as it will peel off like a snake skin. Ensuring the metallic objects are cleaned is a vital part of this process.

After cleaning and removing the dirt off the object it is crucial that the medium at hand is not wet due to cleaning, if so the process is to dry down the metallic objects and let it all be dried out

There are two ways in which coating a metal object can be processed, there is the option of entering the metallic object into a powder coating plant ‘oven’ which is at an extremely hot rate which allows the powder to combine with the metal.

Another option is by using a ‘powder coating gun’ as you arm the gun with the powder you move the gun in a calm and therapeutic manner to allow the powder to settle on the metal and to be combined.

Curing (typically energy intensive since relatively high temperatures are required to get the powder to liquefy and flow*)

*Powder coating formulators have been working to reduce the cure temperatures to allow the process to be used on temperature sensitive materials.