Powder Coating on Metal

Powder Coating on Metal - The Complete Guide

Powder coating is the best process for providing a protective layer on the metal.


Powder Coating on Metal - The Complete Guide

Powder coating is the best process for providing a protective layer on the metal. Applying a powder coating is very cost-effective. By reading this guide, you will recognize the general purpose of powder coating. We will go over the classification, steps, technical details, varieties, benefits, and metals used in powder coating. Take the time to read and find out more!

What is Powder Coating on Metal?

The powder coating process provides a protective layer and robust coating on metals. Unlike most other protective coatings, powder coating is a dry coating method. Once applied to metal, it provides a solid texture. 

Powder coating on any metal is very simple to apply. It comes in a variety of colors (blue, yellow, red, etc), chemical substances, and layer thicknesses.

what is powder coating on metal
two varieties of powder coating

Two Varieties of Powder Coating

Powder coating is typically classified either as thermosets or thermoplastics. Each can be used depending on the job requirements and conditions. 

  • Thermosets are coating material kinds that, once cured, form cross-links between their structural features. This cross-linking is more durable than that thermoplastics. The temperature has less of an effect on thermosets after they have been cured.
  • Thermoplastics are a kind of protective coating that can be fixed by heat multiple times. This is useful for coating release and other post-curing modifications. More malleable in general – with a superb capacity to endure impacts without collapsing. Examples of thermoplastic coating materials are nylon, polyester, and polyvinyl chloride.

Metal Options You Can Powder Coat

Powder coating can be applied to almost any metal. This is due to their ability to retain an electrostatic charge in order to have powder coating material applied to them. Furthermore, the high temperatures used during curing are not sufficiently high to be harmful to most metals. Best candidates for powder coating include:

  •       Electroplated steel
  •       Galvanized steel
  •       Low carbon steel
  •       Chromium steel
  •       Other steel alloys
Metal Options You Can Powder Coat
how tough

How Tough is Powder Coating?

Powder coating gives more toughness and protection to metal surfaces, making it suitable for metallic consumer items, industrial machines, and so on. It withstands severe weather and destructive effect, making it resistant to:

  •       lacerations
  •       tear & wearing
  •       scratches
  •       chipping
  •       fading, etc

Powder coating increases the durability of the steel, allowing the frame to resist destruction and last longer. Because of its durability, it is well-suited for metal pieces that are exposed to sunlight and other environmental conditions.

Why Choose Powder Coating for Metal over Other Coating Treatment

why choose powder coating for metal
why choose powder coating for metal

Powder coating has many advantages. One of the most significant advantages is incredible durability and long life. Furthermore, powder coating can help you save money while also being extra environmentally aware.

Find out more about the benefits of powder coating:

Rust protection. Metal frames can rust when immersed in water and humidity. But thanks to powder coating on metal, it acts as a strong barrier and protection against damaging corrosions.  

Chip protection. Powder-coated metals are durable enough to withstand the environment better than other alternatives that can quickly break, peel, chip, scrape, and rust.

Zero maintenance cost. Powder-coated steel requires little to zero maintenance due to its durability and damage tolerance.

Durable colors and finish. Powder coating produces a harder, more durable finish than traditional paint. As a result, colors last longer and are more vivid than other techniques.

Environmentally friendly. The powder method has few environmental effects. It does not require any hazardous solvents and produces no vapors or toxic gases.

Save both money and time. Powder coating can save you money in the long run. It coats a metal part much faster than other painters. Powder coating does not also require drying time and requires far less manual work because it is sprayed on.  Because of the fast application, you could get through a large number of parts and substrates while also lowering wage costs.

factors that affect longevity
FACTORS That Affect Powder Coating Longevity

When properly used and maintained, its longevity is more or less than 20 years. It depends on different factors. These factors include how powder coating is applied and what environment they are exposed to. When exposed to sunlight or water, they may not endure longer as expected. Frequent use, outdoor atmosphere, and UV ray vulnerability are also factors that make the powder coating deteriorate instantly. 

The type of coating also affects its overall lifespan. A coating made up of urethanes and fluoropolymers is long-lasting. They are perfect when the metals are used outdoor because they are built to withstand harsh conditions. On the other hand, epoxies will last long indoors but degrade faster when exposed outdoor.

different techniques
Different Techniques to Apply Powder Coating on Metal
  • Using a powder coating spray gun is one way of applying a powder coating. It pushes the coating material to the substrate.
  • The second technique is positioning in a curing oven. The heat from the curing oven causes the powder to bond and stick to the metal without using electric charges.
  • UV light is also effective in applying powder coating, instead of curing oven.

Types of Powder Coating on Metals

Epoxies Coating

Epoxies are popular in the market due to their incredible toughness, robustness, and high ability to withstand harmful corrosion, tarnishing, and discoloration. Another advantage is its convenience and variety of cure timetables. Epoxies extremely adhere to any metal frames, helping the frames avoid rust and remain damage-free.

Polyester Coating

Polyester has the quality that gives justice to clients’ money. The polyester coating is divided into two different categories – the Tri Glycidyl Isocyanurate (TGIC) and non-TGIC polyester coating. Each has varying features but both same in terms of excellent impact strength, flexibility, chemical resisting properties, and great mechanical toleration. 

super durable polyester
Super Durable Polyester

The super durable polyester is X2 the benefits of regular polyester. As the name implies, they work greater and provide super durable capabilities in metal coating projects. This coating remains in good condition and good quality for around 5-10 years. Apart from that, they also have excellent chemical resistance and better moisture protection.


Urethanes have a very smooth texture, superb exterior sturdiness, and outstanding chemical stability, making them ideal for metal products like agricultural machinery, air conditioning units, and vehicle rims. Urethanes are usually more costly than other powders.


Fluoropolymers are a mixture of fluoropolymer lubricant and high-efficient resins. This type of coating is useful in construction metals because of its outstanding weather resistance, glossy finish output, and discoloration prevention. 


The hybrid coating is a result of blending the epoxy and polyester together. These coatings offer more excellent weather degradation qualities. They are extremely functional coatings with exceptional chemical defense, better adhesion features, and outstanding deteriorating protection.

Differentiating Powder Coated Metal Over Stainless Steel

The difference between stainless steel compared to powder-coated metal depends on the practices executed to produce them and the sort of metal. It is important to know the difference between the two to meet your specific applications. Further differences are stated below. Take time to read!

  • Powder Coated Metal contains dioxide, iron, and more rusting substance. The powder coating is coated on the steel with great powdered tint and polymer grains to decrease possible damages in this product. The powder coating is electrostatically applied and then, the next step is the healing process in a treatment oven. To accomplish a secure bond, the resin and color are sprayed onto the steel. Finally, the powder coating is dissolved and adhered to the steel uniformly.  
  • Stainless Steel is manufactured same as the carbon fiber. Unlike powder-coated steel, this one won’t require spraying a powder coat on the stainless steel. Its final product has strong corrosion resistance even used under critical conditions and rust-prone environments.

Powder Coated Metal

Stainless Steel or Powder Coated Metal: What is the Most Advantageous

The right one for you will depend on the environment they will be exposed to and their pricing. But both, the powder-coated steel and stainless steels are very simple to maintain, have rusting protection, and have high longevity.

However, if you need a more affordable solution then select the powder-coated metal over the stainless steel. The powder-coated metal also offers wider options than the stainless steel. If corrosion rate is necessary, powdered coated is a great choice. 

Stainless steel may be worthwhile in some situations. Stainless steel is very hygienic. For that reason, stainless steel is often used in beverage production, the food industry, and more. It is very easy to clean and sanitize, and it has no effect on food taste.

Why Choose Powder Coating

Why Choose Powder Coating Instead of Spray Painting?

Powder coating may appear to be a difficult process, but why choose it over spray painting? The basic answer is that powder coating finishes look a lot better than other options. Only powder coating can provide that great quality, amazingly sleek, consistent color wash.

The powder coating also results in a far more durable finish on metal that will not chip or wear off with time. It also adds excellent protection to your appliances with desired colors. Powder coating is a great option for big or small metal coating projects.


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