[meteorite-list] Is Brahin a ruster ?

From: Göran Axelsson <axelsson_at_meteoritecentral.com>
Date: Mon Feb 7 15:24:24 2005
Message-ID: <4207CF94.10208_at_acc.umu.se>

Hi!

I got a full slice six months ago. When I got it it had already started
to rust all over under it's coat of lacquer. Sadly it had broken in the
freight so I removed a small piece of it (20g) to start experimenting
on. I sanded off all the lacquer and cleaned it in isopropyl alcohole,
used as antifreeze in lorries to dry the compressed air.

To see how stable it was I really mistreated it. I polished it,
I etched it, polished it again. I even carried it around a week
in my wallet. After the wallet it developed one small spot of rust.
During this time I did check it regularly with a microscope to
see if something happened.
To stop the rusting in the big 2/3 slice that was untreated
I dried it in an oven at 70 C over night and then put it in an
airtight container. It hasn't rusted any more.

So I think Brahin is a ruster depending on the environment and
humidity.

My next step is to try treating it electrolytically to remove any
chlorine in it.Mistreat it a bit more and see if it made any
difference.

Regards, G?ran

Lars Pedersen wrote:

> Hello All
> Thanks for you show reports and poictures, I enjoy them.
>
> I have just traded for a big fullslice of Brahin.
>
> Is it a ruster ?
> How do I prevent ?
> etc. etc. ?
>
> Best
> Lars
> --------------------------------------------------
>
> New meteorite forum:
>
> http://www.worldofmeteorites.com/
> ______________________________________________
> Meteorite-list mailing list
> Meteorite-list_at_meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
>
Received on Mon 07 Feb 2005 03:29:08 PM PST