
12/21/11, 02:05 PM
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Join Date: Mar 2005
Posts: 1,158
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I would start at a local community college that has a pottery class.
Ask the instructor about enamel glazes used for pottery bowls and plates intended for food. (lead free)
If they have a recommendation, you might ask them a favor....
First wire brush and sandpaper all the rusted areas.
Ask for a recommended glaze with matching color. Many of the pottery glazes start out one color and a change to a different color after they have been put in the kiln. I think those glazes are actually microscopic pieces of glass that melt and set when fired.
Find out what temperature the kiln reaches to set the glaze. ie. the melting temps of Iron and steel are around 2700 - 3000 F
A high fire ceramic kiln will heat up to 2345 F, so theoretically it should be safe. I would ask anyway.
So ask a favor to brush on a little glaze and fire up your pot in the kiln. Maybe buy someone lunch as a dab of glaze and a half dozen hours in the kiln with other school projects shouldn't cost much.
Now, if the rust spots are at the bottom where they pose a leak, I would first ask a friend with a welder to clean and weld a piece of steel (maybe even a piece of old soup can) over the rusty, leaky area. then grind it somewhat smooth. Rather than welding, a brazing technique with a torch might be better as there would be less risk of damage to the existing metal through melting. Brazing wire melts at a lower temperature. After the patch...Then move to the steps outlined above.
Last edited by BillHoo; 12/21/11 at 02:15 PM.
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