[meteorite-list] Cleaning Scale off Stonys

From: Rob Wesel <nakhladog_at_meteoritecentral.com>
Date: Wed Jan 4 16:38:45 2006
Message-ID: <000601c61177$2693f910$59681618_at_robewcufk0z2s3>

Hi guys-

Using HCl will send the chloride straight to the fresh metal and oxidize it.
Tried it, don't recommend it.

Rob Wesel
http://www.nakhladogmeteorites.com
------------------
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and we are the dreamers of the dreams.
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----- Original Message -----
From: "Kevin Forbes" <vk3ukf_at_hotmail.com>
To: <rsvp321_at_hotmail.com>
Cc: <meteorite-list_at_meteoritecentral.com>
Sent: Tuesday, January 03, 2006 5:53 AM
Subject: RE: [meteorite-list] Cleaning Scale off Stonys


>
> Hi Pete and list, interesting read this one, just an untried thought after
> years of cleaning ancient coins now and then, the caliche is a carbonate,
> I am assuming, it should dissolve rapidly in HCl or Hydrochloric acid,
> dilute to slow it. Also, I had success on certain coins removing bad stuff
> by heating and quenching in water, SSSSSSS and it flaked off.
> Cheers, Kevin.
>
>>From: "Pete Pete" <rsvp321_at_hotmail.com>
>>To: meteorite-list_at_meteoritecentral.com
>>Subject: [meteorite-list] Cleaning Scale off Stonys
>>Date: Mon, 02 Jan 2006 17:45:34 -0500
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>>
>>Hello, List,
>>
>>...so quiet in here...everyone still hung-over, eh?
>>
>>A while ago I posted a request for any suggestions to make getting scale
>>off of stone meteorites any easier, without a response.
>>
>>I tried a few things myself and I'll pass on the results for anyone who is
>>interested:
>>
>>De-scalers like CLR or Limeaway are messy, smelly and potentially
>>dangerous, even in a diluted form down to 25% with distilled water - and
>>it changed the appearance of the surface somewhat.
>>
>>A furnace humidifier "scale-be-gone" solution was the same disappointment.
>>
>>
>>Hydrogen Peroxide, however, was a definite help, and at the household 3%,
>>it's relatively safe.
>>
>>I submerged the intended stone in the peroxide for about an hour, and
>>while keeping it wet I started cleaning.
>>It is still a meticulous task - I still needed to use the dental picks,
>>but the scale comes off a lot easier and in bigger chips, and doesn't
>>appear to harm the meteorite.
>>
>>I soak the stones in alcohol when I'm done to displace the water.
>>
>>I'll try 10% later, and if there's an marked advange I'll post the
>>results...unless someone else tries it first...
>>
>>I suggest you wear disposable gloves, though, as the stuff will bleach
>>your fingertips.
>>
>>Any input or further suggestions would be appreciated.
>>
>>Cheers,
>>Pete
>>
>>
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Received on Wed 04 Jan 2006 04:38:06 PM PST