[meteorite-list] Rust removers

From: Pekka Savolainen <pekka.savolainen_at_meteoritecentral.com>
Date: Thu Apr 22 10:29:58 2004
Message-ID: <3F6D5489.9070601_at_dlc.fi>

Hello, Pierre and the list,

Oxalic acid is a simple member of the caboxylic acids -family, you can
find it from the rhubarb. Itīs strong enough to remove rust from porcelain
etc. I have tried it in some Nantans and Campos with not so good results,
itīs too weak to remove any deeper rust from FeNi.

Some mineral-collectors boil their rusty specimens in the liquid Oxalic
acid,
havenīt tried that. If you want to try, you should take care of the
ventilation
good enough. Even if the acid is weak, the vapours are dangerques to breath.

Also, if the acid is used as a liquid including water / powder-acid has been
washed with water, the specimens must be dryed after the bath. Anyway,
Oxalic acid is a good remover of rust for household items, bath-rooms and
so on, so if youīll find it to work with irons, I suppose, there is no
harm for
them to use it, itīs a very week acid, and can be washed out with water, so
you donīt have to neutralize it. Think the main thing is to get the
specimens
dried good enough after the bath, or the result may be worse than the
original...;-

Donīt know the product Dithonite.

take care,

pekka


Pierre-Marie PELE wrote:

>Hello to the List,
>
>I'm searching for rust removers. Here in France are sold two products
called Oxalic Acid and Dithonite. Did you ever used these
>products on iron meteorites ?
>
>Thanks in advance.
>
>Check out soon my book "Les Meteorites francaises". You can get
information on my website www.meteor-center.com
>
>Best regards,
>
>Pierre
>------------------------------------------
>
>Faites un voeu et puis Voila ! www.voila.fr
>
>
>
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Pekka Savolainen
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FIN-71330 Rasala
FINLAND
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Received on Sun 21 Sep 2003 03:34:33 AM PDT