Want to be an instant expert when talking about the ins and outs of pretreatment for powder coating? If so, you’ll need to understand the concepts that are commonly used when discussing cleaning and priming parts. Here are some key terms you need to know:
Pretreatment: Process of preparing a part for finishing. This blanket term can be applied to any kind of cleaning (washing, wetting, etc). The pretreatment process occurs before the part is powder coated (the pre- in pretreatment).
Displacement: This can refer to any situation where something is moved, such as when grease is moved off of the surface of a part by pressure washing.
Mechanical Action: This term describes processes that produce displacement, such as blasts of air out of spray nozzles or brushes rubbing against a part.
Wetting: Any process that loosens dirt and grime as a result of soaking the part (and the soil) in a liquid solution.
Dispersion: Reducing the concentration of a contaminant, typically so that it can be removed from a part.
Emulsification: The natural dispersion of two opposite elements. Think oil and water.
Neutralization: This term typically refers to using an alkali compound to break down oil or grease.
Iron Phosphatizing: A popular process where the surface of metal parts being treated reacts with a phosphatizing compound to form an insoluble, non-metallic coating that remains on the surface of the parts.
Sequestration: Any pretreatment technique that keeps different solutions of water and chemicals separated to prevent contamination.
R.O.: An abbreviation for “reverse osmosis,” which is typically used to describe a filtration process that produces very pure water. The water can be used to rinse parts without risking contamination by waterborne minerals or debris.
See any other terms or concepts that we need to add for pretreatment? Feel free to contact us and let us know.