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Old 12-02-2012, 03:45 PM   #1
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Default High Temp Paint Failure

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/w...202_082216.jpg

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Old 12-02-2012, 04:18 PM   #2
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Originally Posted by eettner View Post
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/w...202_082216.jpg
Propane/Air flames burn about 2000°C, which is about 3600°F.
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Old 12-02-2012, 04:18 PM   #3
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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.

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Old 12-02-2012, 04:20 PM   #4
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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.

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Old 12-02-2012, 04:21 PM   #5
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Wow that certainly exceeds the 1200 maximum. What should I coat it with so it doesn't rust?

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Old 12-03-2012, 12:50 AM   #6
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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.

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Old 12-03-2012, 01:37 AM   #7
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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.

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Old 12-03-2012, 07:25 PM   #8
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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/

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Old 12-03-2012, 07:30 PM   #9
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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.

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Old 12-03-2012, 07:56 PM   #10
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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.

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