May 29, 2015 Off Comments in Powder Coating by

Powder coating comes under the category of coatings that is easily applicable as it is free flowing and in the form of a dry powder. The major difference between a traditional liquid paint and the new technique of powder coating is that powder coating does not require any solvent to keep the coat bound together and to fill in the gaps amidst the liquid in the suspended form. The technique to apply the coating is called electrostatic. It is cured under hot temperature which lets it flow and shape up in the form of a skin. The powder is available in two forms. These two forms are thermostat polymer and thermoplastic. Powder coating creates and excellent hard finish unlike the conventional liquid paint. It is largely consumed and is mainly used to coat metallic objects like household appliances, aluminum built stuff, drum hardware auto parts and spare parts of different vehicles etc. New and advanced technologies have categorized many other materials that can be power coated by means of various methods.

As power coating is not in a liquid state, it has the ability to produce thicker coatings as compared to the traditional liquid paints. The powder coating does not even get soggy or is over diluted and gives a smooth look to any surface. Whether it is coated in a horizontal or vertical manner, powder coating rarely leaves any traces behind. As there is no involvement of a solvent, power coating emits volatile organic compounds (VOC). In the end, many colors in the powder form can be applied before the curing process. This lets the colors to blend and exhibit special effects in just a single layer of coating.

It is relatively easy to apply thick coatings which are cured smooth and texture free rather than applying smooth and thin powder coatings. As the thickness of the coating reduces the layer becomes somewhat orange peeled because of the size of the particle in the powder and the glass transition temperature (Tg) of the powder.

The particle size in most powder coatings varies from 30 to 50 μm, which is at a softening temperature of around 80 °C and at a melting temperature of almost 150 °C. They are cured at around 200 °C. For these kinds of powder coatings, the layer builds of 50 μm will acquire a very acceptable and smooth layer. The desired surface or texture can only be seen at the completion of the finish product. The producers of power coating prefer to have a certain level of the orange peel  effect as it is helpful to hide the defects of the metal to be power coated which had occurred during the production of that metal as the result of the finished goods is also prone to show less fingerprints.

The biggest advantage of the power coating system is that it can be reclaimed and reused. On the contrary, if a number of powder coatings are already done then it may reduce the chances of reclaiming the overspray.

At Architectural & Industrial Metal Finishing Company, LLC, our custom powder coating lines are designed with quality and versatility in mind. To learn more or to see how we can assist you on your powder coating needs, contact Architectural & Industrial Metal Finishing Company today.