Our stringent pre-treatment process guarantees your surfaces are ready for powder coating and result in a highquality finish: PPC the surface solution specialist. The powder coating process involves three basic steps:
- part preparation or the pre-treatment
- powder application
Removal of oil, soil, lubrication greases, metal oxides, welding scales etc. is essential prior to the powder coating process. It can be done by a variety of chemical and mechanical methods. The selection of the method depends on the size and the material of the part to be powder coated, the type of soil to be removed and the performance requirement of the finished product.
Chemical pre-treatments involve the use of phosphates or chromates in submersion or spray application. These often occur in multiple stages and consist of degreasing, etching, de-smutting, various rinses and the finalphosphating or chromating of the substrate. The pre-treatment process both cleans and improves bonding of the powder to the metal.
Abrasive blasting is another method of preparing the surface prior to coating. It is also known as sand blasting. Blast media and blasting abrasives are used to provide surface texturing and preparation, etching, finishing, and degreasing for products made of wood, plastic, or glass. The most important properties to consider are chemical composition and density; particle shape and size; and impact resistance.
This method of preparation is highly efficient on steel parts such as I-beams, angles, pipes, tubes and large fabricated pieces. Media blasting services coupled with coating services are at additional cost.
Powder application is to spray the powder using an electrostatic gun, or corona gun. The type of nozzle used will depend on the shape of the piece to be painted and the consistency of the paint.
Curing is the process when powder is exposed to elevated temperature, it begins to melt, flows out, and then chemically reacts to form a polymer in a network-like structure. Normally the powders cure at 200°C (390°F).
PPC the surface solution specialist
Feel free to call us about any product you may want powder coated