Orange Peel Powder Coating Defects

The level of orange peel is visually determined by comparing to industry standards typically the powder coating institute pci visual smoothness standards.

Orange peel powder coating defects. Back ionization can form when your gun to part distance kvs and microamps aren t monitored closely enough. We have divided the top powder coating problems into powder application problems and coating properties problems. It may be barely noticeable or very obvious. Some powder formulations will appear to have more orange peel than others no matter what you try to do to avoid it.

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. Defined as an uneven texture of smooth finish products that resembles the skin of citrus fruit. 13 05 2014 defects fault finding causes blistering is caused by moisture or contamination under the paint due to. Coating defects fault finding coating defects car straight out of the oven into a cooler room.

Knowing orange peel in powder coating is not ideal it is important to know some of the. Orange peel is when the surface of a coated product doesn t have an even smooth appearance to it after the coating is applied. These areas with too much powder will suffer from back ionization and from defects like orange peel. However there are some basic things to check when addressing a particular orange peel problem.

Page 5 of 35 issue date. Posted by on 11 july 2017. Below you will find a description of the problem its possible causes and how to solve it. 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.

Posted by on 22 september 2017. Excessive is in the eye of the beholder of course. One of the most common quality issues with powder coating is an orange peel effect. Moisture absorption forms the substrate especially from putties and fillers before painting.

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. 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. 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. When powder coating jobs go wrong.

The term orange peel refers to a bumpy coating surface that resembles the surface of an orange. It is not considered a defect if it is not excessive. Hi as described orange peel is in fact a surface defect. 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.