What is powder coating?

What is powder coating?

Powder coating is a dry finishing process that applies electrostatically charged powdered paint to a surface, which is then cured under heat to create a durable, protective, and aesthetically appealing coating.

Powder coatings are based on polymer resin systems, combined with curatives, pigments, levelling agents, flow modifiers, and other additives. These ingredients are melt mixed, cooled, and ground into a uniform powder similar to baking flour. A process called electrostatic spray deposition (ESD) is typically used to achieve the application of the powder coating to a metal substrate. This application method uses a spray gun, which applies an electrostatic charge to the powder particles, which are then attracted to the grounded part. After application of the powder coating, the parts enter a curing oven where, with the addition of heat, the coating chemically reacts to produce long molecular chains, resulting in high cross-link density. These molecular chains are very resistant to breakdown. This type of application is the most common method of applying powders.

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How long does powder coating last?

This is a very common question. There are many aspects to consider when determining the longevity of powder coatings including the nature of the application and the surrounding environment. Salt, pollution and general deposits will effect the lifespan of the product and it is suggested that you follow a maintenance program to assist the longevity of the coating.

Powder coatings are considered extremely resilient, and are a coating of choice for use on gas or oil pipelines which are buried in the earth or underwater. Powder coatings are also commonly used on automotive parts and commercial and residential appliances because of their excellent chip resistance, hardness and or chemical resistance. From the perspective of resistance to light and UV degradation, some powder coatings are outstanding, being used on the facades and window sections of large buildings.

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Our workshop is fully equipped with the latest tools MIG & TIG welding to accomplish clean and smooth finishes. This enables us to produce individual and unique metalwork to customer's requirement. We also provide on-site welding services.

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