Powder Coating is an advanced method of applying a decorative and protective finish to virtually any type of metal. The powder used in the process is a mixture of finely ground particles of pigment and resin. The powder is electrostatically sprayed onto the surface to be coated. The charged powder particles adhere to the electrically grounded surfaces until the powder is fused in the curing oven, resulting in a smooth coating. The result is a uniform, durable, high quality and attractive finish.
Here are 5 advantages of powder coating versus wet paint:
- Efficiency– The economic benefits of powder coating are numerous but the largest benefit has to do with efficiency. The average transfer efficiency of powder coating is 60-70%. With liquid paint you have a transfer efficiency of 30-35%, and roughly 50% of the product is evaporated during the application process.
- Performance – Powder coatings are more durable and more resistant to corrosion, chemicals and weather than liquid coatings. Powder coated surfaces are also more resistant to chipping and scratching due to the thermal bonding process that takes place during curing. Powder coating is also less prone to runs or drips than wet paint, providing a more uniform coating than liquid paint. Moreover, the vibrancy of the color of a powder-coated part tends to stay bright and fresh longer than its wet-painted counterpart. The result of using powder coating is that the product will have the most attractive, durable, high quality finish available.
- Safety – Wet paint is flammable, carcinogenic and full of volatile organic compounds (VOCs). These chemicals can be hazardous if not handled properly. Powder coatings, on the other hand, are generally VOC-free materials and contain no solvents, meaning they do not involve the potentially harmful chemicals typically found in a wet spray project.
- Environment– VOCs (volatile organic compounds) in the wet painting process are among industrial pollution concerns. Because powder coatings contain no solvents and emit negligible, if any, polluting VOCs into the atmosphere, they are more environmentally friendly than their wet paint counterparts. Powder coatings meet all Environmental Protection Agency requirements for air and water pollution control and most powder coating materials are considered landfill/non-hazardous materials.
- Production Advantages – The main advantage from a manufacturing perspective is that powder coated products are fully cured within 30 minutes of coming off the line. This allows us to move the parts through final assembly the same day they are painted. Wet paint can take several days to completely cure.
MPE specializes in medium volume manufacturing and on our in-house powder coat line is an integral part of our value proposition. Our continuous flow system allows for rapid color changeover enabling us to spray more than a dozen different powders each day.