powder coating

[old car fan]

.Does anyone here do this?Working on a vacuum tank ,looks like dirt on the finish .Do you think the powder is contaminated?I have done at least 50 with no concerns,now a problem.I personally would put on my own car,but is for a customer with a Auburn,It still looked better than factory,just not happy.

Edited January 28, 2018 by old car fan (see edit history)

[61polara]

A picture will really help.

[dibarlaw]

My powder coater refused to do the Vacuum tank on my 1925 Buick because of all the solder in the assembly.

[Larry Schramm]

28 minutes ago, dibarlaw said:

My powder coater refused to do the Vacuum tank on my 1925 Buick because of all the solder in the assembly.

 

It would probably just melt out.

[old car fan]

Never had a problem with the solder just outgassing of the different high temp lab metals I've used.

[kgreen]

The melting point of tin, which is the largest constituent of solder is about 450 degrees F.  Tin is alloyed with other metals to reduce this melting point to somewhere around 360/370 degrees.  This temperature can vary by solder manufacturer.  Powder coating requires a cure temperature of 400 degrees F.  It stands to sound reasoning that a powder coater would not risk damaging a customers part with the temperature ranges involved here.

[Mark Shaw]

Proper prep, primer, & multiple paint coats has been working well for me. 

 

[old car fan]

I agree with all that was said,Several of our own cars I did the tanks,we drive like we stole  them. I tested one before I started doing the powdercoat,knowing The melting point.no problem.We have may 500 or so tanks,so if I lost one in the oven,no big deal.,WE have restored over 50 thanks with the same process,heck ,last year at Hershey,i rebuilt one.My question is ,can the powder be bad?We have never had a tank returned.

Edited January 30, 2018 by old car fan (see edit history)