The powder coating process is complex and detailed. Professional powder coaters are quality assured and undergo a stringent ongoing process of examination and assessment to ensure that current high standards are maintained.
The powder coating process also has a varied glossary of terms. To help you understand powder coating and finishing we created this Glossary of Terms used in Powder Coating.
Abrasive – A selection of coarse materials used to clean metal prior to finishing Examples include plastic beads, grit or sand as well as steel shot
Acrylic – A powder coating containing polymers of acrylic.
Accelerator – A specialist material designed to speed up the hardening and curing process.
Additives – Additives are chemicals applied to the powder coating process to improve certain properties such as gloss controls, curing and texturing additives.
Adhesion – The bonding process whereby a firm attachment happens with a coating. Adhesion can be affected by the surface requiring finishing and surfaces should be clean, smooth and non porous.
Alkaline – Substances and environments that are high in basic Ph value.
Ambient – The environmental conditions that can affect how well the powder coating process is applied and cured.
Application – The process of applying a powder coating to a finish or a substrate.
Back Ionization – This is a build up of powder particles during the electrostatic application. It limits the ability of additional powder to be deposited onto the metal to be coated.
Binder – The resin that are the main powder component. This polymerises and binds the other components into the solid powder coating film.
Blooming – A haze forming on the powder coating that can be removed when required.
Bonding – The process whereby the polyester powder bonds onto the surface being painted.
Brightness – The surface reflects light and gloss levels are established.
Blistering – Blistering occurs when bubbles formed under a the powder coated surface. It is usually a result of the expansion of trapped air, moisture, or corrosion.
Cartridge Booth – A specific type of booth containing systems to recover powder overspray that can be collected and reused.
Cleaner – These are detergents, solvents or other approved cleaning materials that are used to clean and prepare surfaces prior to powder coating.
Contamination – Occurring where foreign bodies such as dirt hinder the quality of the finished coating.
Curing – The hardening process to enable powder to bond and cure on the profile once powder coated.
Delamination – The separation between two layers of coating or the coating and the substrate.
Dry Film Thickness – Depth of applied coating powder before curing.
Edge Coverage – A coating powder’s ability to flow over, build, and adhere to sharp corners, angles and edges.
Epoxy – a coating manufactured with epoxy resin that has high corrosion resistance and colour retention when exposed to sunlight.
Micron – The standard unit of measuring the thickness of a powder coated finish in 1/1000 of 1mm.
Orange Peel – A surface appearance similar to the skin of oranges. Caused by restricted flowing powder on the material to be coated.
Pretreatment – The preparation of the component to be powder coated to improve powder adhesion and corrosion resistance when finished.
Recovery – The process whereby powder that has not bonded to the surface and is surplus is recycled and re-used.
Stripping – The procedure whereby original powder coating is stripped to enable the profile to be recoated.
Touch-up – The repair of small damage on a painted surface that can normally be touched up with spray or liquid touch up paints int he same colour reference.
Virgin Powder – Fresh powder directly from the powder manufacturer that does not contain any recalled or recovered powder previously applied.