Orange Peel Powder Coating Defects

The term orange peel refers to a bumpy coating surface that resembles the surface of an orange.

Orange peel powder coating defects.

Defined as an uneven texture of smooth finish products that resembles the skin of citrus fruit. Excessive is in the eye of the beholder of course. Whether your powder coating or liquid coating orange peel is usually not desirable because it creates a poor overall finish appearance when your all done coating your product. It may be barely noticeable or very obvious.

This is when issues arise in the actual process of applying a powder coating to a substrate the result of which is then a reject. Rejects are the bane of any job shop s existence when applying powder coatings pulling a part out of the oven only to see disappointing orange peel spoiling the powder coated finish sections where the coating has sagged or opacity issues bring a sigh of frustration alongside the question of what happened. First if you are using the electrostatic corona gun reduce the level of kv s you are using to charge the powder approximately 40 60. Page 5 of 35 issue date.

When powder coating jobs go wrong. One of the most common quality issues with powder coating is an orange peel effect. Posted by on 11 july 2017. Moisture absorption forms the substrate especially from putties and fillers before painting.

Posted by on 22 september 2017. Below you will find a description of the problem its possible causes and how to solve it. The level of orange peel is visually determined by comparing to industry standards typically the powder coating institute pci visual smoothness standards. When powder coating jobs go wrong.

Some powder formulations will appear to have more orange peel than others no matter what you try to do to avoid it. Knowing orange peel in powder coating is not ideal it is important to know some of the. Hi as described orange peel is in fact a surface defect. One of the most common causes for this is the quality of the powder coating you are applying mainly the particle size distribution as described by shane.

We have divided the top powder coating problems into powder application problems and coating properties problems. Powder coating application problems. Rejects are the bane of any job shop s existence when applying powder coatings pulling apart out of the oven only to see whorls of orange peel powder sections where the coating has sagged or opacity issues bring a particular kind of dread alongside the question of what happened. 13 05 2014 defects fault finding causes blistering is caused by moisture or contamination under the paint due to.

These areas with too much powder will suffer from back ionization and from defects like orange peel. Back ionization can form when your gun to part distance kvs and microamps aren t monitored closely enough. Coating defects fault finding coating defects car straight out of the oven into a cooler room. However there are some basic things to check when addressing a particular orange peel problem.