Orange peel in powder coating: causes and solutions
Orange peel, as it is known, is a common problem in powder coating, in which the coated surface has an uneven structure reminiscent of the peel of an orange. This phenomenon not only affects the appearance, but can also negatively influence the functionality of the coated workpiece.
Common causes of orange peel
- Insufficient surface preparation of the workpiece
- Incorrect viscosity or composition of the powder coating
- Unsuitable application techniques or parameters
- Insufficient drying or curing conditions
- Environmental conditions such as temperature and humidity
How to avoid orange peel
To prevent the formation of orange peel, you should take the following measures:
- Optimal surface preparation: Thoroughly clean and degrease the workpiece to remove contaminants.
- Suitable powder coating selection: Use high-quality powder coatings that are suitable for your specific application.
- Correct application techniques: Ensure that your spray equipment is properly calibrated and uses the correct settings. High-quality powder coating systems from Gema, Wagner and Nordson offer precise control options for even coating.
- Controlled curing conditions: Ensure compliance with the powder coating manufacturer's recommended drying times and temperatures.
- Monitor environmental conditions: Keep the temperature and humidity in your coating area within the recommended values.
By implementing these measures and using high-quality equipment, you can effectively prevent the formation of orange peel and achieve excellent coating results.
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