Gloss black problems, need help!!!

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TXPC
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Joined: Thu Jan 11, 2018 4:25 pm
My Location: 76502

Gloss black problems, need help!!!

Post by TXPC » Thu Jan 11, 2018 4:55 pm

Hello everyone, I'm in Texas and started Coating about a month ago. I'm shooting Gloss Black, it flowed out real nice but when I look closely at it, it looks like little cracks all over the parts. Is my powder contaminated?

For my prep work, I clean the part in a hot tank, sandblast down to bare metal, outgas twice the cure time @ 50° higher temp, then I wipe down the part with Denatured Alcohol.

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duke46
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My Location: East Coast NC
Location: New Bern NC
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Re: Gloss black problems, need help!!!

Post by duke46 » Fri Jan 12, 2018 7:54 am

I will never understand why a coater thinks he has to wipe blasted parts down? We are not doing paint where the parts have been sanded and then you wipe them down and then prime and sand and wipe and then tack the parts down and then paint. Wiping media blasted parts then you are just asking for lint problems.

It can be hard to get a good picture of cracks but seeing it then you might get better advice? Most but not of the time when there are cracks then it has to do with under cure and the part can be cured again to proper temp and they will be gone. You need an IR gun to check part temp so if you do not have one then you can get them like at Lowe's or Home Depot. Harbor freight has the also but not sure how good they are?

As for as your outgassing then not all parts need to be outgassed unless the part was exposed to oil and grease. Steel does not need it as bad as aluminum parts might and not all of them will need outgassed.
All I have said is said just for meanness so I don't have to argue with anyone!

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