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- Newsgroups: sci.physics.fusion
- Path: sparky!uunet!think.com!ames!pacbell.com!tandem!zorch!fusion
- From: Dieter Britz <BRITZ@kemi.aau.dk>
- Subject: RE: Postmortem analysis of Tom's cells
- Message-ID: <A93A8077727F207104@vms2.uni-c.dk>
- Sender: scott@zorch.SF-Bay.ORG (Scott Hazen Mueller)
- Reply-To: Dieter Britz <BRITZ@kemi.aau.dk>
- Organization: Sci.physics.fusion/Mail Gateway
- Date: Mon, 21 Dec 1992 19:22:16 GMT
- Lines: 40
-
-
- Originally-From: chuck@coplex.com (Chuck Sites)
-
- >transported by the electrolytes that include Pt, Cu, Zn, S. These
- >were not minor concentrations, and the source of Cu, Zn was from a
- >brass connector that made contact with the electrolyte. In the other
- >active cathode (Takahashi style) we saw Pt, Cu, Fe, Zn. This cell had
- >an inactive stainless steel part submerged in the solution. To me, it
- >is some what amazing that stainless steel which is pretty inert and
- >fairly resistive to chemical attacks, becomes apparent in our analysis
- >even though its not suppose to be an active electrolysis participant.
- >It was only in contact with the electrolyte, and yet we see deposits Fe
- >on the Pd cathode. Tom mentioned to me that stainless should have Ni in it.
- >It I recall it could also have Vanadium too. If it does, these weren't
- >apparent in our analysis. It may be that that the electrolytic etching of
-
- Good on you, Chuck, for doing this analysis. Let me comment on one aspect of
- this. Jed Rothwell has been talking about ultrapurity that electrochemists
- always insist upon and I have minimised this. Reading the above, I think he
- may be right, after all. It's all a matter of where you set your levels. It
- amazes me that someone doing a long-term electrolysis in an aggressive medium
- would allow brass to contact the electrolyte, or stainless steel. "Stainless
- steel" certainly does corrode. I recently read that we get most of our
- chromium from the stainless steel kitchen ware we use these days. Even Pt
- corrodes to some extent in cnf cells, hence its presence on the Pd after a
- time. Brass - well, it just dissolves, if we are talking about traces.
-
- If you think that acid cleaning, the use of triple distilled water, avoidance
- of rubber or plastics or oil films or hardware store solvents is ultrapurity,
- then Jed is right. For an electrochemist, all these things are routine in
- most experiments except maybe large-scale industrial work. For us, ultrapurity
- is another world beyond all that elementary stuff, where you might use a
- clean room with very little dust in the air, and expensive "suprapure" reagents
- (very expensive, pro analysi is not good enough) and worry about metals
- leaching out of glass, or organics in the air. This level is not, I believe,
- standard in cold fusion.
- ----------------------------------------------------------------------------
- Dieter Britz alias britz@kemi.aau.dk
- Kemisk Institut, Aarhus Universitet, 8000 Aarhus C, Denmark.
- ----------------------------------------------------------------------------
-