Powder coating is environment friendly because it contains no solvents and is 100 percent solid. Thus, it helps reduce health hazards to operators.
FREMONT, CA: Powder Coating, also known as “dry painting,” is the process of applying a protective color finish to a wide range of products. Powder Coating uses pigment and resin that are statically charged to bind the paint to a surface.
Let us look at the advantages and disadvantages of powder coating:
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Advantages
Eco-Friendly
Powder coating is very environment friendly because it contains no solvents and is 100 percent solid. Thus, it helps reduce health hazards to operators.
Less Waste
The equipment used to spray powder coating is designed in a way that the powder which does not cling to the surface will enter the spray cycle again. Then it can be recovered and reused, which minimizes wastage and prevents sewage residue.
Better Mechanical and Physical Properties
Powder coatings have better mechanical and physical properties and are more durable than conventional paint. This is why industrial painters prefer powder coatings over liquid paints.
Disadvantages
Thin Coatings are Difficult to Produce
Powder coatings contain no solvent and are 100% solid. Therefore, with a minimum amount of application, the initial thickness is formed, and it contains no volatile components, which makes it impossible to have thicknesses less than 25 microns. On the other hand, liquid paint can be thinner and have a lower percentage of solids.
Production and Application Problems of Powder Coatings
The powder coating is blended in molten form, which makes it impossible to change the color once the paint is produced. But, in liquid paint, the color can be changed in all stages by adding pigment paste.
Only for Coating Metals
Powder coatings can not be applied to non-metal surfaces due to the typical method of its application and conditions of charging the substrate, along with the fact that the substrate needs to be cured up to 180 degrees.
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