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Kael

Is this a problem?

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I finally finished my coal forge! It's made of a Massive old bus rim with plumbing fittibgs attatched to the bottom with slits for air and ash. Inside of this i've piled up several flat rocks in order to create a bowl-shpaped firepot. Here's the problem: the pipes are cast iron, but the flange connecting them to the rim is zinc-plated. My forge is located out in the middle of a field, so ventilation's no issue, but if the zinc flange gets hot enough, will this cause a health concern?

Alex

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YES!!! But you don't haver to breath the fumes. Once the Zink is burned off your good to go. You might consider using a mild acid solution to remove the zink before you put it together....

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It could be a problem maybe, maybe not but best not to risk it, what could be a bigger problem is the rocks you have inside the fire pot depending on what kind they are they could explode on you if they get to hot I know sandstone is bad about that. when I was little for fun we would place them in the camp fire and watch them pop. I would suggest fire brick, furnace cement, or refractory clay.

just remember its always better to be safe then sorry even if it means spending a little extra time or money

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Amen to the above. We lost a great man in this art from cooking off galvaized pipe. RIP Jim "papaw" Wilson!!

Staff note, this is not correct, there is a long thread about this, with real facts. Jim had other medical issues, Please get facts straight before posting rumors.

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Since there is a layer of material above it, the flange may not get hot enough to fume, however overnight in vinegar, or 5 min in muriatic acid and you don't have to worry about it ever.

Phil

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Vinegar will remove the zinc?


Yes. I soaked my flange in vinegar overnight, and it took about 60% of the zinc coating off. The rest I could have just peeled away, but I was lazy and just lit the forge and let it burn off.

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It could be a problem maybe, maybe not but best not to risk it, what could be a bigger problem is the rocks you have inside the fire pot depending on what kind they are they could explode on you if they get to hot I know sandstone is bad about that. when I was little for fun we would place them in the camp fire and watch them pop. I would suggest fire brick, furnace cement, or refractory clay.

just remember its always better to be safe then sorry even if it means spending a little extra time or money




HELLO! READ THIS GUYS POST. A LITTLE ZINC BURNING OFF IN A FEILD IS NOT YOUR PROBLEM. EXPLODING ROCKS ARE YOUR PROBLEM.

ROCKS IN AN OUTDOOR FORGE ARE NOT O.K.

DANGER!

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Use firebrick, then. Probably a really good idea. Thanks everyone!

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