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Post by jonjel on Feb 28, 2011 12:17:59 GMT 1
Would anybody know of a clear plastic which might be resistant to HF?
I am involved in a process where dilute HF is present and we need to replace a soda-lime glass window with something which remains intact. We were thinking of using polycarbonate or acrylic. We could use quartz as a last (expensive) resort.
Any ideas or suggestions would be welcome.
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Post by marchesarosa on Feb 28, 2011 12:36:43 GMT 1
What is HF, please?
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Post by jonjel on Feb 28, 2011 12:38:46 GMT 1
Hydrofluoric acid M. Rather nasty stuff, but in this case unavoidable.
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Post by carnyx on Feb 28, 2011 12:47:51 GMT 1
Jonjel tried Perspex? Seems OK for 4% HF according to Nalgene www.nalgenelabware.com/techdata/chemical/index.asp(Use their tool to find other suitable materials) PS; a couple of years ago you posted a blocked pipe problem on the BBC science board; what was the outcome? |
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Post by jonjel on Feb 28, 2011 12:56:45 GMT 1
Carnyx.
I will try that site. Perspex is I am pretty sure an acrylic.
As for the blocked pipe problem, all can now be revealed.
It was on a large liquid gas storage facility. I can't remember the capacity and don't have time to dig in the files, but it was enormous. Tens of Thousands of tons. The pipe went through the side of the thing at low level.
That bocked pipe is no longer a problem. In their infinite wisdom someone (government perhaps?) decided to shut that one down and the site is being flattened.
Pity really as it could have been dead handy last winter!
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Post by jonjel on Feb 28, 2011 16:15:37 GMT 1
Well,
I expected a blizzard of replies and suggestions from scientists on a science board, or have you driven the real scientists away.....
Maybe you are all to busy picking on each other to bother with a genuine enquiry.
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Post by eamonnshute on Feb 28, 2011 16:25:23 GMT 1
When fluorine gas was first produced it immediately reacted with the container, so they got around it by using a container made of fluorspar, which already contains fluorine.
So a plastic which already contains fluorine should be resistant. There seem to be several available, such as Teflon, although I don't know what would be suitable for your purpose. Try Googling for Plastic + fluorine.
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