Powder coating is a type of paint colour that is applied to various metals; the coating goes on in a powder form, and then is made to adhere to the metal with a slight electrical charge. This makes powder coating more durable and truer to its colour than standard liquid paints that often end up with an uneven finish. If you manage any type of industrial or car repair facility and often need metals coated, note a few questions you might have about powder coating, so you know if this process is the best choice for your pieces and applications.

Is powder coating indestructible?

A powder coating is far less likely to peel away, chip or flake off or fade over time than standard liquid paints because a powder is not as likely to break down as a liquid. The electrical charge that adheres it to the metal also allows for a stronger hold.

However, powder coating is not indestructible, and you shouldn't assume that a metal piece will never need a fresh powder coating, or that you don't need to add a fresh coat of sealant over the piece on occasion. While you may see far less damage to the coating when you choose powder versus liquid, you will still need to maintain that coating over time.

Can a powder coating be used on food grade metals?

Some powder coatings are designed to be safe for coming into contact with food, medicines and other such materials, but not all. If your metal pieces will be used in the food service, food prep or pharmaceutical industry, be sure to mention this to the company you choose for your powder coating services. They can then note the choices you have for the powder, and for top coats that may be needed for added safety.

Can powder coatings be applied over rusty metals?

While powder coatings adhere more easily to metals because of the electrical charge used to apply them, they do need a solid surface for that adherence, and they are not meant as a bonding agent or filler. Once rust flakes away from metal, a powder coating attached to that rust will go with it. While you can certainly ask a powder coating specialist to coat a rusted piece, this will usually result in an uneven appearance and a temporary coating that will eventually flake away; note, too, that the coating won't stop the rust from spreading and causing even more corrosion to the metal.