High Temp Paint Failure

eettner · Dec 2, 2012

This high temperature paint (1200F) seems to have melted right off of my stand. The stand is welded mild steel and I cleaned all of the grease off prior to painting using mineral spirits. The burners are 10 inch cast iron, low pressure, connected to a low pressure regulator. I doubt that there was 1200 of heat generated underneath the keggle. Anyone have any ideas?

http://i725.photobucket.com/albums/ww259/eettner/20121202_082216.jpg

passedpawn · Dec 2, 2012

eettner said:
This high temperature paint (1200F) seems to have melted right off of my stand. The stand is welded mild steel and I cleaned all of the grease off prior to painting using mineral spirits. The burners are 10 inch cast iron, low pressure, connected to a low pressure regulator. I doubt that there was 1200 of heat generated underneath the keggle. Anyone have any ideas?

http://i725.photobucket.com/albums/ww259/eettner/20121202_082216.jpg

Propane/Air flames burn about 2000°C, which is about 3600°F.

eettner · Dec 2, 2012

That's the paint that burnt off of the stand I painted. I didn't paint the stainless kettle. It somehow blackened the kettle. Luckily it was just a test run with water.

KBentley57 · Dec 2, 2012

I know the flame isn't in direct contact with the bottom (or it might be, depending on the setup), but the flame itself is well over 1200 F. According to wikipedia: https://en.wikipedia.org/wiki/Propane_torch, the flame of a propane gas can hit a max of 3600 F. Even at a third of that, it is at the max temp of your paint, 1200 F. It would easily bake it off.

eettner · Dec 2, 2012

Wow that certainly exceeds the 1200 maximum. What should I coat it with so it doesn't rust?

Junkster · Dec 2, 2012

Those spots look almost like something was on the metal the the mineral spirits didn't remove and the paint didn't adhere to. I've seen similar on things I've painted where I didn't get all of the contaminants removed.

jcaudill · Dec 2, 2012

Are you keeping the pot elevated off the stand? If not that is something you can do to help control this. It gets over 1200 easily.

worxman02 · Dec 3, 2012

You can try using VHT Flameproof paint ( http://www.vhtpaint.com/products/flameproof/ ). It only goes up to 2000ºF but it might be worth a shot. There aren't too many paints available that will withstand direct flame. You could get your stand coated with something like Jet-hot which is used for engine exhaust headers, but you have to have it professionally coated. http://www.jet-hot.com/coatings/jet-hot-extreme-2500/

worxman02 · Dec 3, 2012

You can also start getting really expensive with ceramic coatings ( http://www.accumetmaterials.com/new/refractocoat.htm ) I would just wipe down the exposed areas of your brewstand with light machine oil and then buff it off with a dry paper towel if you want to try and prevent rust. It will burn off pretty quick once you turn the burner back on.

user 108580 · Dec 3, 2012

Heat shields should help. Keep all that heat under the kettle and not on your stand. My shields also have a venting space that should help direct excess heat away from the stand.

About to test mine in a couple days. I used Duplicolor Engine Enamel ceramic paint. It was $4 a can. I'll let you know how it holds up.

RoadKing · Dec 3, 2012

worxman02 said:
You can try using VHT Flameproof paint ( http://www.vhtpaint.com/products/flameproof/ ). It only goes up to 2000ºF but it might be worth a shot. There aren't too many paints available that will withstand direct flame. You could get your stand coated with something like Jet-hot which is used for engine exhaust headers, but you have to have it professionally coated. http://www.jet-hot.com/coatings/jet-hot-extreme-2500/

That won't work either, I'm using it now. (The VHT.)

eettner · Dec 4, 2012

There is about 5-6 inches between the burner and keg bottom. The burner is mounted below the stand about 1/4". I stripped the paint and recleaned. The smell of that burning paint was so off putting that I'm going to leave the steel bare. I'll just be proactive about keeping it clean and dry. Thanks for the advise guys

kh54s10 · Dec 4, 2012

I suspect that the mineral spirits had some impurities in it that caused the paint to fail. I used the same paint on my turkey fryer burner and it did not burn off. At least on the outside.

sccrgolee · Mar 10, 2013

mrrshotshot...how'd that duplicolor work out?

user 108580 · Mar 11, 2013

sccrgolee said:
mrrshotshot...how'd that duplicolor work out?

It holds up well. Gone through 3 batches with no bubbling paint. A few scratches and dings from the pots scraping but I like how it's holding up. Probably do a touch up once a year.

sccrgolee · Mar 12, 2013

nice! is that something you can get at HD or lowes?

prandlesc · Mar 12, 2013

eettner said:
Wow that certainly exceeds the 1200 maximum. What should I coat it with so it doesn't rust?

Coat it with frequent use. Brewing every week will keep the rust away.

user 108580 · Mar 12, 2013

sccrgolee said:
nice! is that something you can get at HD or lowes?

Try an auto store. I got it at Napa Auto Parts.

sccrgolee · Mar 13, 2013

thanks!

Atl300zx · Mar 14, 2013

you could do this like teh BBQ guys do their smokers...treat it like cast iron, lightly coat in oil before and after use.

High Temp Paint Failure

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