[meteorite-list] Rust on iron meteorites : new method ?
From: M come Meteorite Meteorites <mcomemeteorite2004_at_meteoritecentral.com>
Date: Sat Feb 18 12:34:51 2006
and last, what percentage is good take 99% or under?
--- M come Meteorite Meteorites
<mcomemeteorite2004_at_yahoo.it> ha scritto:
> where is possible found NaOH? Here in Italy the
> its exaggerated, want 100 Euro for a 50g bottle...
> --- Marcin Cimala <marcin_at_meteoryt.net> ha scritto:
> > > So I?m very sceptical!
> > >
> > > Ingo
> > >
> > > P.S. Let me know the results (also in a long
> > Pierre.
> > This could be best example. Dronino.
> > My 5kg endpiece was cleaned in water and NaOH.
> > it was cut on EDM and
> > cooled by mixture of water and oil (and slices
> > usually lie in factory for 1
> > days before I take them). Then I etched them,
> > in water, then in
> > alcohol.
> > They rust ? No.
> > Ofcourse not every meteorite is the same. My
> > mundrabillas are stable but I
> > still have one endpiece that rust all the time. It
> > was re-etched 3 times
> > now. Can't win. Small rust in the same 2 places.
> > Just bad specimen.
> > Morasko "ruster" ? So why my 2 big endpieces
> > any protection are
> > stable ? I cleaned 5kg endpiece using
> > electrochemical method for seweral
> > days (water + NaOH). Then clean in alcohol and
> > secured by Balistol. The same
> > to slices cut from 6kg specimen. All was in cold
> > room only with Balistol as
> > protection. Stable. And also was cut on EDM and
> > cleaned in water after
> > etching.
> > And most of this specimens I have etched months
> > So Im sure that they
> > are stable and can guarante this.
> > Some years ago I was panicked when I must work
> > "rusters" like my 6kg
> > Nantan from eBay that I cut on my saw for 7 hours
> > (in 2 days). It was all
> > the time in water becouse it can't be removed from
> > saw before cutting end.
> > Status after 2 years ?
> > Stable. 100% on etched surface and 85% on "crust"
> > surface. But it have
> > weathered rust outside and this is why there are
> > bubbled of red water on
> > some places. Now Im woking on it to remove rust
> > make it pretty silver
> > from outside. But its stable. No rust, only drops
> > water.
> > So Im very calm in using water in meteorites. In a
> > short time ( minutes).
> > Only sometimes hours are secured (f.e. cutting)
> > -----[ MARCIN CIMALA ]-----[ I.M.C.A.#3667 ]-----
> > http://www.Meteoryt.net
> > marcin_at_meteoryt.net
> > http://www.PolandMET.com
> > http://www.Gao-Guenie.com GSM +48(607)535 195
> > --------[ Member of Polish Meteoritical Society
> > ]--------
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> M come Meteorite - Matteo Chinellato
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Received on Sat 18 Feb 2006 12:34:48 PM PST