[meteorite-list] dronino (in)stability: a solution ?

From: Steve Schoner <steve_schoner_at_meteoritecentral.com>
Date: Thu Apr 22 10:29:56 2004
Message-ID: <20030917163526.95458.qmail_at_web12707.mail.yahoo.com>

--- Zelimir Gabelica <Z.Gabelica_at_uha.fr> wrote:

> By the way, does the NaOH process attack
> Widmannstätten patterns ?
>
> Best wishes,
>
> Zelimir

No, it does not attack the Widmanstatten pattern. But
it is nevertheless helpful to lightly re-polish the
surface and etch with nitrol. (Be sure to use
distilled water in rinsing afterwards, then a soak for
a few hours in alcohol afterwards. Dry for a few
days, then re-coat)

Steve Schoner/ams
http://www.geocities.com/american_meteorite_survey


 

--- Zelimir Gabelica <Z.Gabelica_at_uha.fr> wrote:
> Hi John, List,
>
> I did not try Steve Schoner's sodium hydroxide
> recipe to remove rust from
> iron slices but, as a chemist, I have not any
> argument against its efficiency.
> I just proposed a product that is cheap, safe for us
> and harmfull for the
> meteorite, easily available and of very simple and
> direct use. After 2
> minutes rubbing, your slice is, in principle, ready.
> It is difficult to evaluate the efficiencies and
> advantages(drawbacks) of
> the 2 processes. I believe the more procedures we
> have, the better for our
> iron preservation.
> By the way, does the NaOH process attack
> Widmannstätten patterns ?
>
> Best wishes,
>
> Zelimir
>
> At 08:30 17/09/03 -0700, you wrote:
> >Here it is again.
> >
> >Rust Sufferers,
> >
> >You might consider using Steve Schoner's tried and
> true sodium hydroxide
> >process. I had several slices of old Campo that
> would rust no matter how
> >may times I polished them or how dry I kept them.
> Then, two years ago, I
> >used the sodium hydroxide process and the slices
> have been rust free ever
> >since. One of the slices sits in a metal pan out
> in my garage where it is
> >subject to the heat and humidity and there is
> absolutely no rust on it.
>
******************************************************
> Prof. Zelimir Gabelica
> Groupe Sécurité et Ecologie Chimiques (GSEC) -
> ENSCMu
> 3, rue A. Werner
> F-68093 MULHOUSE Cedex, FRANCE
> Tel: +33 (0)3 89 33 68 94
> FAX: +33 (0)3 89 33 68 15
> e-Mail: Z.Gabelica_at_uha.fr
>
******************************************************
>
>
>
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Received on Wed 17 Sep 2003 12:35:26 PM PDT