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POWDER COATING

HomePOWDER COATING

What is Powder Coating?

Powder coating is a type of coating that is applied as a free-flowing, dry powder. The main difference between a conventional liquid paint and a powder coating is that the powder coating does not require a solvent to keep the binder and filler parts in a liquid suspension form. The coating is typically applied electrostatically and is then cured under heat to allow it to flow and form a & quot;skin". The powder may be a thermoplastic or a thermoset polymer. It is usually used to create a hard finish that is tougher than conventional paint. Powder coating is mainly used for
coating of metals.

Advantages of Powder Coating over Wet-Paints:

Many concerns or issues associated with wet paint finishing are eliminated or minimized with the powder coating process. The advantages of powder coating over wet paint are many, and they generally fall under four categories:

Safety – Wet paint is flammable, carcinogenic and full of volatile organic compounds (VOCs). These chemicals can be hazardous to plant/shop personnel 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. Although powder coating materials can combust in a very narrow concentration of powder and air, their lack of solvents or VOCs means almost none of the short-term and long-term health or fire workplace threats associated with wet painting.

Performance – Powder coatings are more durable and more resistant to corrosion, chemicals and weather than liquid coatings. Powder-coated surfaces are more resistant to chipping, scratching and other such wear due to the thermal bonding process during curing. Unlike wet paint, powders also don’t
run or drip, 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, highquality finish
available.

Environmental – VOCs in the wet painting process are also 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. Moreover, powder coating is
a clean process: powder overspray can be retrieved and reused, and unused powder can be reclaimed and returned to a hopper for recirculation through the system, with negligible waste. Plus, most powdercoating materials are considered landfill/ non-hazardous materials. Powder coatings meet all
Environmental Protection Agency requirements for air and water pollution control.

Operational Costs – Powder coatings are cheaper and can cover more area than most other organic finishes, translating to lower material costs than wet painting processes. Because they lend themselves well to automation, powder coatings can also reduce costs related to operational labor, as minimal
operator training and supervision are required for a powder line. Compared to wet paint processes, operational cost savings using powder coatings can also be realized in less waste produced, lower energy costs, reduced disposal costs and less rework due to lower reject rates.

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