Saturday, April 21, 2012

I'm Melting....

These are silicone carbide shelves. Q) Are they supposed to melt like that?

Well. I thought the answer was a resounding NO, but it turns out that ceramic-bonded silicon carbide is less impervious to the aggressive fluxing action of the soda, and can suffer from "progressive grain boundary corrosion." Son of a bit.

These were bought used, for short money, along with some others that are holding up like champs - those must be nitrite-bonded.

I can't afford new shelves right now, so my option is to grind the living shirt out of these, and the - reluctantly, because I am well aware of the pitfalls - apply a thin coat of kiln wash to the undersides as well as the top. Oh, what a world, what a world.
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