Silicon carbide in nitric acid.
Silicon carbide in nitric acid.
(OP)
I realise that this is not a question about metals but perhaps someone out there can point me in the right direction. I've been scouring the web and numerous books for quantitaive data on the chemical resistance of silicon carbide in nitric acid. Occasionally I can find a general comment giving a vague suggestion about silicon carbide being inert or chemically resistant but no actual data. I'm interested in two situations: 1. 5M nitric acid at 50 deg C 2. 12M nitric acid with intermittent exposure. I suspect that sintered carbide would be a better bet than reaction bonded silicon carbide (because of the presence of free silicon). The application is as a bearing in some pumps my company is trying to source.
Any pointers would be appreciated.
Any pointers would be appreciated.





RE: Silicon carbide in nitric acid.
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However, HF/nitric can do things to the surface, and is used to remove free carbon from the surface: http://
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RE: Silicon carbide in nitric acid.
Here is on bit of literature for Hexaloy. Normally if a material will handle hot concentrated HNO3 anything less is that much better, not like sulphuric.
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RE: Silicon carbide in nitric acid.
See exactly what they mean by SiC. Pure SiC and SiC with a binder (no matter how minimal) may be two different things. We see this with "binderless" WC.
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
Good engineering starts with a Grainger Catalog.
RE: Silicon carbide in nitric acid.
You can also contact CoorTek
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Plymouth Tube
RE: Silicon carbide in nitric acid.
Once again - thanks for your interest.