[meteorite-list] R: acid for pallasite

From: Francesco Moser <cojack_at_meteoritecentral.com>
Date: Wed, 21 Sep 2016 15:26:02 +0200
Message-ID: <002701d2140b$b4127530$1c375f90$_at_tiscali.it>

Hello!
Yes, what I wrote in my first email was not clear and easy to
misunderstand.
I don't want to destroy the slice, I want to save it, but I need to remove the rust.
On the surface I can easily do with sand paper, but I don't know how to procede inside the sockets of the fell olivines and also on the olivines for glue them back in the sockets.

I studied a lot of chemestery at high school and also did a lot of laboratory, we used also very high concentrated acid and bases.
I know those substances are dangerous and I know how to manage them!
Thanks for the advise!!!

Thanks!

<x>x<x>x<x>
Francesco

-----Messaggio originale-----
Da: Meteorite-list [mailto:meteorite-list-bounces at meteoritecentral.com] Per conto di MexicoDoug via Meteorite-list
Inviato: marted? 20 settembre 2016 17:57
A: meteorite-list at meteoritecentral.com
Oggetto: Re: [meteorite-list] acid for pallasite

Resending see my opinion below interpreting your question to deal with extracting the olivines by consuming the metal matrix.

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-----Original Message---


I have never wanted to consume an iron meteorite, but if I did, I would buy some inexpensive 37% (concentrated) muriatic acid for $5 a gallon or whatever it is costing now.

Then buy both goggles an a face shield neoprene gloves and dilute the acid with water to as close to 20% as possible. Put on the protection and cover all my skin with clothing. Then I would simmer (hold just below boiling) a pot of water and put a second pot inside with the meteorite in 20% acid with a clear cover and keep the simmer until satisfied with the dissolution.<div> The 20% would be critical to me due to the properties of the acid, not more. Less would be slower so it depends on the job that needs to be done.

Muriatic acud is a common name for hydrochloric acid industrial low grade can be bought in places in the US for example to add to pools to lower pH or for cleaning some toilets and plumbing etc.

Never done this but it is what I'd do since HCl is probably the safest strong mineral acid that's cheap. Other strong acids and more dilute or lower temps might be sufficient, so you can work up to your need if time is not an issue.

Be careful and famaliarize yourself withe the risks if you haven't already.
Best wishes
Doug
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-----Original Message-----
From: Francesco Moser via Meteorite-list <meteorite-list at meteoritecentral.com>
To: Meteorite-list <Meteorite-list at meteoritecentral.com>
Sent: Tue, Sep 20, 2016 09:43 AM
Subject: [meteorite-list] acid for pallasite Hello!
Wich kind of acid I can use for dissolve the iron/rust in a Pallasite, so I can save the Olivine?
Thanks a lot!
<x>x<x>x<x>
Francesco

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Received on Wed 21 Sep 2016 09:26:02 AM PDT