Powder coatings are the substitute for paint and it is basically used to reduce the use of toxic chemicals. Being eco-friendly, it is commonly used. Powder coating is considered as an environmental friendly source of painting, but it has certain disadvantages. It flakes, bubbles, chip or cracks. The main reasons behind this are discussed below:
1. Composition of the Substrate – The power coating consists of layers these multi layers affects each single layer negatively and thus affects the powder coating itself.
2. The Foundation of Any Substrate is Bound to Fluctuate in Smoothness – Thick layer of coating must be applied for covering the surface. Sometimes sufficient thick materials are not applied to cover the surface, thus causing the erosion of the surface.
3. Metal Edges or Corners are not Coated Properly – Sharp edges are not coated properly, thus, corrosion occurs at the edge and not in the middle of the surface. So, naturally they are susceptible to corrosion.
4. Incorrect Pre-treatment – During the time of rinsing the metal object, some sedimentary accumulates at the bottom and powder coating fails to have its impact where sediment has dried up.
5. Using the Wrong Powder for Coating – Environmental factors are important to consider before choosing the powder coating. Often this thing is neglected and wrong powder coating is used.
6. Powder Coating is too Thick or too Thin – Powder coating also fails because it is applied using the wrong method. Often the powder coating is too thin or too thick, thus, causing the corrosion. The optimal powder coating is required in order to prevent the coating from getting damaged.
7. Inadequate Curing – Powder coating may get breakdown if it is not cured adequately, no matter how correctly the substrate is pre-treated. Curing a powder coating takes a certain amount of time at a particular temperature. It may get a breakdown if sufficient time and optimal temperature are not provided to it.
8. The Wrong Temperature – The baking cycle plays a significant role in powder coating process. The metalwork must reach the suggested temperature for a certain amount of time. The coating should be uniform and not just on the surface.
9. Poor Quality Materials – Powder coating fails sometimes, because some sort of poor quality materials are used which contain excessive amount of fillers.
10. The Environment – Powder coating fails if it is exposed to harsh environment. Extreme temperature, UV rays, collision and weathering, all add to the deteriorating of the powder coating.