On Wed, 10 Jul 2002, Andrew Case wrote:
> Hydrogen Peroxide resistance of PTFE, FEP, PFA is listed as
> "Excellent" here (90% peroxide)...
> All this suggests that the material that failed was either filled
> teflon (with a peroxide incompatible filler) or not really
> teflon...
Bear in mind that when these references say "excellent", they may be
referring to short contact during processing, rather than prolonged
exposure. Long-term peroxide compatibility is a specialized topic and
you won't necessary get authoritative answers on it out of a general
chemical-compatibility chart.
That said, I agree that asking some searching questions about the exact
material in the failing valve is a good idea, if anyone can be found who
will answer them. :-)
Also, if the details can be resolved (maybe even if they can't be), it
would be a Good Thing to publish this formally -- perhaps submit a
Technical Note to the Journal of Propulsion & Power?
Henry Spencer
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