Reply With QuoteWhat is the coating process and specification? What is the material and what is the image showing?
Hello and good day every body.
I'm new in coating **********.
Now a few part after coating become the appearance is not too good.
Every part after coating there will be a dot or to describe, when you feel the
surface, you'll feel like there is sharp things under the coating, SAM_4324.jpg
sometimes there also a bubble shape.
why is this occurred?
can anybody guide me?
What is the coating process and specification? What is the material and what is the image showing?
if you can see. the blue colour is our product after undergone powder coating. you can see 1 dot appeared. sorry for the uncleared image.
SAM_4324.JPG
why is it happened.? how to make sure the defect occurred in the future?
what do you mean by coating process, specification and material?
"Powder Coating" answers that.Originally Posted by Siti
Could be a number of things.
1: Poor surface preparation.
2: humid atmosphere distributing moisture before or during the powder spray before firing.
3: Dust in the atmosphere before firing.
4: Sand blasting particles embedded in the material before powder spray. (See #1)
5: unclean oven with crap falling from the ceiling to the part during firing.
6: If using gas heating, crap in the gas-pipes blowing through burners.
7: If using air-boosted gas then crap in the air supply. Maybe rust-scale, dust or moisture in the air.
Basically, you need to carefully examine every step of the way. It will be a human induced problem. If everything is clean and processed as it should be then there would be no problem.
Siti,
Welcome to the forum. Please check with your powder manufacturer for the proper cure temperature and time.
Also, check the expiration date of the powder you are using and make sure the containers you store your powder in are tightly sealed and free of moisture.
Ron
Just for fun... Powder coating videos...
http://www.engineeringmotion.com/vid...ntake-manifold
http://www.engineeringmotion.com/vid...ntake-manifold
Thank You PinkertonD
now i got the idea and what to do next..tq so much
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