Steps for the Powder Coating Process

Powder coating refers to a paint finishing process in which we apply dry, free-flowing thermoplastic powder to a surface. We then melt and harden it into a smooth coating. The powder coating process applies to various materials, including metal, plastics, glass, and MDF. Winona Powder Coating in Northern Indiana and Southern Michigan offers competitive colors, finishes, and quality options that you cannot readily achieve with conventional paint. Below are the steps we follow to complete the powder coating process.


Preparation

To achieve the desired finish, there needs proper preparation of the surface. The preparation procedure depends on the type of base material. Generally, the surface gets thoroughly cleaned off any oil and grease, then rinsed and later, etched. Etching removes any oxides on the surface, providing a larger surface area for sticking the powder coat. Next is neutralizing the surface where the material gets dipped in a neutralizing solution. Again, however, things vary since each chemical solution works with specific base materials.

 

Powder Coating Ingredients

After preparation, we then set the ingredients straight for coat application. The commonly used ingredient here is a polymer resin blend, together with other required pigments and additives, allowing for the creation of particular colors and finishes desired. We melt all ingredients together, forming a blend of the uniform mixture. It’s then cooled, molded into bricks, then the bricks are ground, creating the fine coating powder you need.

 

Powder Coating Application

The process for applying powder coat paint differs from other painting options, as it uses electromagnetic properties. First, the powder gets fed into a paint gun that uses friction or electric current to charge the particles. Then, the coated part is grounded, creating opposite charges to attract the paint particles. The coating thickness depends on whether the coat is internal or external and where the part will be used. Note that the powder keeps sticking to the part’s surface, given that the part is grounded. This gives a chance for multiple passes to cover part.

 

Curing

After a complete coating, the part is subjected to an oven of a minimum of 160ºC. After reaching its temperature, the powder melts, flows, creating extensive chemical chains that make the coat more rigid and durable. As it cools, the finish assumes a gel-like consistency till it cools to room temperature, whence it’s completely cured. Once cured, most powder coatings never melt again so that they can be used in a wide range of environments and applications without worry.

 


Contact Winona Powder Coating

Powder coating is unique compared to conventional painting techniques, and so is its process of application. The best thing about the process is that after curing, the coating remains rigid and durable, resistant to many elements, including extreme temperatures. Visit our website or contact the Winona Powder Coating facility for high-quality powder coating services in Northern Indiana and Southern Michigan today.

 

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