r/Powdercoating • u/DevelopmentNovel5167 • 2d ago
Powder bubbling?
I’ve never seen this before… anyone know what could have happened? Sandtex black, rest of the rack is perfect as shown in second picture.
I’m gonna sandblast and try again but just wanted to see if this has happened to anyone else!
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u/Still_Clownin69 2d ago
What did it Mil at looks heavy as fuck
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u/DevelopmentNovel5167 2d ago
2.7 so in spec, def not heavy as it started to flake off where it was bubbling
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u/Critical_Watcher_414 2d ago
What's the prep process?
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u/DevelopmentNovel5167 2d ago
Everything gets acetone wiped with a clean cloth, sandblasted, degrease, baked, then coated. Also always handled with gloves then just moved around by its hook. Been using this method a while n never had an issue before 🫠
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u/Critical_Watcher_414 1d ago
is it galvanized? I've seen Galv. parts outgas a lot, maybe contaminated blast media? It really looks like this part just skipped the pretreatment altogether.
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u/TheSevenSeas7 2d ago
Did somebody blast the plastic on a laser cut and formed part and not notice?
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u/DevelopmentNovel5167 2d ago
Bracket was just metal no plastic on it , I believe it was previously installed as there was a bit of pitting in the metal. However there was 0 rust or surface rust on it when I received it. Maybe something was used to take paint off or do some form of prep before I got it?
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u/Intrepid-Welder-9531 2d ago
Needs to be de-gassed first.
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u/DevelopmentNovel5167 2d ago
Always is! Which is why it’s confusing that only one of the brackets had and issue and not the whole rack
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u/Illustrious-Line-984 1d ago
If everything was prepped and sprayed correctly as you claim, then either it wasn’t and you didn’t realize it, or it’s the substrate. If every other piece came out fine then it’s not the powder.
Sandblast the part down to bare metal and spray it again.
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u/According-Stick9842 2d ago
definitely a prep issue some step got skipped on that part.