[labnetwork] expired process gas

[Michael Khbeis]

Phil, 

I did have a very bad experience with using HBr several years (~3 yrs) after its expiration date.  Eventually moisture ingress created corrosion of the inside of my coaxial lines and the entire line needed to be replaced.  

Best of luck,

Dr. Michael Khbeis
Associate Director, Washington Nanofabrication Facility (WNF) 
National Nanotechnology Infrastructure Network (NNIN)
University of Washington
Fluke Hall, Box 352143
(O) 206.543.5101
(F) 206.221.1681
(C) 443.254.5192
khbeis at uw.edu
www.wnf.washington.edu/



> On Jan 7, 2015, at 10:01 AM, Himmer, Phil <PhilH at ee.montana.edu> wrote:
> 
> Hello,
> 
> Does anyone have any practical experience using Chlorine and Hydrogen Bromide gas past it’s expiration date? We use the gas for ICP etching of chrome and aluminum.
> We have small cylinders(air liquide 7-size) of each that still have gas in them but are now years past the expiration date. I have pulled them from the gas cabinet with the plan to replace them but am having difficulty finding a vendor who offers these gasses in these small volumes. We are trying to not use lecture bottles due to disposal considerations.
> 
> looking forward to suggestions
> phil
> 
> 
> Dr. Phillip Himmer
> Manager Montana Microfabrication Facility
> Montana State University
> Bozeman Mt 59717
> 
> Office Ph: 406-994-7178
> email:	philh at ece.montana.edu
> 
> 
> 
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