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**Guest** · 07-31-2008, 03:33 PM

Re: Defects and problems with PBTP SS Chrome

I was looking at the other pic on Bonded and Extruded (SS) Chrome sale page here http://www.powderbuythepound.com/catalo ... cts_id=154
And looking at the picture of that wheel that TNC did, that looks much closer to the second batch of powder I got that has the specs on it (Britebond Chrome).

PBTP, is it possible that I was shipped X-treme chrome or something else the first time I ordered it back in Feb? I know for sure it was labeled Bonded and Extruded Chrome...

**BeeBob** · 07-31-2008, 04:07 PM

Re: Defects and problems with PBTP SS Chrome

I don't know about a poss switched batch of powder, but the spots...is this the only part you get these spots on and are they in the same area? If so, it could be a very bad case of OG. If you have any OG preventive powder, shoot that first and try the chrome on top of that or try a diff piece to compare? Most of it looks like contamination of some sort, but a couple of spots look like they have pinholes going to the substrate.

**Guest** · 07-31-2008, 04:38 PM

Re: Defects and problems with PBTP SS Chrome

If you think is OG try flat black base and see if that helps.

**Guest** · 07-31-2008, 05:27 PM

Re: Defects and problems with PBTP SS Chrome

Interesting-I just talked with Caseywan and promised to send him a sample of OG forgiving black

**Guest** · 07-31-2008, 05:36 PM

Re: Defects and problems with PBTP SS Chrome

Originally posted by THEKING

Interesting-I just talked with Caseywan and promised to send him a sample of OG forgiving black

Eh nobody listens to me anyways ..... LOL :P

**Guest** · 07-31-2008, 05:46 PM

Re: Defects and problems with PBTP SS Chrome

And here I was thinking we are of the same mind

**Guest** · 07-31-2008, 06:37 PM

Re: Defects and problems with PBTP SS Chrome

Originally posted by Harleydad

Originally posted by Powder_Coating_Pros

Eh nobody listens to me anyways ..... LOL :P

Jeeeez Chris, you sound just like my wife. The only difference is she's right.

Your advice is always spot on my friend.

Thanks.

Lets see how this black goes for Casey. One of the things TNC taught me about coating is take 1 change at a time. Do not try 2+ changes at one time. Pinpoint the issue easier like this.

**Guest** · 08-02-2008, 04:27 AM

Re: Defects and problems with PBTP SS Chrome

Thanks for the advice all, sorry for the late reply but I haven't had time to get back on here.

Shelly gave me a call just after I posted this the other day and assured me that there's no way the powder I ordered the first time is different than the second time, and that whatever is cause the spots could be causing the color to change. Thanks for the call and the advice Shelly, it was good talking with you.

Anyway, I really don't think it is outgassing because all of the spots are completely flush with the surface of the powder, none are raised or sunk in at all. At least I've never seen outgassing do that anyway.

I did shoot some more of the Britebond chrome the other day and each time resulted in those same spots - I shot it on 3 aluminum beer bottles, and an aluminum alternator bracket that had a base coat of KL Primer.

After I did the bottles I used some NIC super chrome on aluminum and it came out perfect. I also shot some Caswell flat black, NIC clear vision, and some of the old PBTP SS chrome (that they are no longer selling). Everything I shot after the bottles came out perfectly with no signs of those spots.

Then I shot some NIC super chrome directly over top of the throttle body pictured above with the spots and it came out perfect with now spots. The first time I had the problem on that same throttle body with Britebond, I tried just shooting a second coat Britebond and still had the spots. But it did not with a second coat of NIC super chrome.

Then at the end of the night I tried the Britbond chrome again and it resulted with the same spots. At the end of the night I also did a couple bottles with the old SS chrome, and some Columbia SS chrome (which I haven't even opened the bottle of in at least 8 months), and everything in the oven came out with the spots.

So only thing I can think of is something contaminated the Britebond chrome and when it's in the oven with other stuff it is floating around contaminating everything.

Another I just remembered that I didn't think to mention was that I had used Acrylic clear about a week ago. Would that cause this? After using the acrylic last week I completely took my gun apart as much is I could and blew it out well and blew out my spray booth and everything. Then after I got the specs I did the same twice and cleaned out my gun with PRE.

**Guest** · 08-02-2008, 09:31 AM

Re: Defects and problems with PBTP SS Chrome

One thought to ponder:
Exhaust air system. Every oven must be exhausted. Exhausts create a negative environment so that air seals operate properly and remove VOCs and other cure products from the oven. Additionally, the exhaust purges the oven prior to start-up. The requirement for purge is to change the enclosure atmosphere four times in approximately 20 min prior to ignition.
The main job of the exhaust is to maintain a safe environment. A good rule of thumb is to exhaust 10,000 cu ft of air (expanded for elevated temperatures) for every gal of solvent driven off in the oven. This assures the oven atmosphere will be maintained below the lower explosion limit of the solvent with a safety factor of four.
Exhaust also eliminates smoke build-up. Smoke is produced when curing some electrocoatings and powders. The exhaust requirement here is best recommended by the coating supplier.
The flexibility of convection curing keeps it popular with today's finishers, despite pressures to increase quality and reduce the space required for paint shops. A properly designed and installed convection oven requires little attention relative to pretreatment and application processes. It runs effectively with simple controls. It can be combined with other curing methods. Filtration or indirect firing can be added to improve quality. Because the exhaust can be controlled so well, abating oven gases is reasonably achieved. To conserve on factory space, ovens can be elevated, located outside or on building roofs.

**Guest** · 08-02-2008, 09:33 AM

Re: Defects and problems with PBTP SS Chrome

IT sounds like the bonded and extruded chrome has been contaminated and the only thing I can do is replace it...

**Guest** · 08-02-2008, 09:55 AM

Re: Defects and problems with PBTP SS Chrome

we are checking the chrome at the GA facility for contamination since this is the first issue we have had with it (standard procedure) and I will keep you posted.

**Guest** · 08-02-2008, 04:11 PM

Re: Defects and problems with PBTP SS Chrome

When I first coated the throttle body earlier this week it was the first time I had even taken the powder off the shelf and opened the bags, so I'm not sure how it would have gotten contaminated on my end, but realistically I'm sure it is much more likely that it was contaminated on my end by me rather than at the PBTP facility. So if you in fact find no contamination or problems at the GA facility, then there is no need to send me more powder because it would have been my fault.

Thanks again for all the help Shelly!

**Guest** · 08-03-2008, 10:21 AM

Re: Defects and problems with PBTP SS Chrome

Casey, take the olive branch

**Guest** · 08-03-2008, 03:22 PM

Re: Defects and problems with PBTP SS Chrome

Originally posted by THEKING

Casey, take the olive branch

I just Google'd that phrase for 10 minutes and still don't know what it means, lol.

Sorry, I'm a pretty simple guy...

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Defects and problems with PBTP SS Chrome

Defects and problems with PBTP SS Chrome

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