[meteorite-list] Experiment Update #1

From: Sterling K. Webb <sterling_k_webb_at_meteoritecentral.com>
Date: Fri Mar 3 00:38:58 2006
Message-ID: <006901c63e84$bc75cdc0$4b4ae146_at_ATARIENGINE>

Hi,

    Liquid Drano contains sodium hypochlorite
as well as sodium hydroxide, so there are plenty
of chlorine ions in this solution, and soaking in it
is likely to increase the chlorine ions in the iron
rather than leach them out.

Sterling K. Webb
-----------------------------------------
----- Original Message -----
From: "G?ran Axelsson" <axelsson_at_acc.umu.se>
To: <meteorite-list_at_meteoritecentral.com>
Sent: Thursday, March 02, 2006 6:08 PM
Subject: Re: [meteorite-list] Experiment Update #1


> This is not a rust cleaner treatment, it is a rust stopper treatment.
>
> To remove the rust you have to use more traditional methods, like
> polishing.
>
> Acidic solutions with a low Ph makes it easier to dissolv the iron
> hydroxides in rust but at the same time the iron will be unprotected
> against oxidation. Basic solutions with a high Ph stops the iron
> hydroxides to dissolv but protects the iron against oxidation by
> passivation, it becomes chemically inert.
>
> The idea behind the hydroxide solution is to protect the iron while
> chloride ions are leached out of the meteorite.
>
> I would recommend small volumes in the bath, maybe twice the volume of the
> meteorite but at least covering it, combined with numerous replacement of
> the solution. In the beginning it should be closer between the changes of
> the solution as it faster gets contaminated. When the chlorine levels in
> the meteorite and the solution is in balance it doesn't help to let it lie
> longer.
>
> Archeologists sometimes uses ordinary tapwater in the initial bath but at
> the end they use deionised or distilled water.
>
> And whatever you do, don't use chlorinated water, that could make it rust
> even faster.
>
> /G?ran
>
> tracy latimer wrote:
>
>> About 10 days ago I dunked my poor Fredericksburg in what I hoped would
>> be a rust removal bath of half Liquid Drano and half anhydrous alcohol.
>> Since then, I have swirled it about at least once a day, and some of the
>> rust has come off, but not all. The bath is lightly tinged with brown
>> and there is a fine peppering of rust flakes on the bottom of the glass
>> jar. I will give it another week or so, but if there is not a
>> significant change in the quantity of rust in suspension rather than on
>> my meteorite, Freddy will be taken out of the bath and more old fashioned
>> methods of getting rid of rust will be regretfully employed.
>>
>> Watch this space for more fast-breaking news!
>> Tracy Latimer
>>
>>
>> ______________________________________________
>> Meteorite-list mailing list
>> Meteorite-list_at_meteoritecentral.com
>> http://six.pairlist.net/mailman/listinfo/meteorite-list
>>
>
> ______________________________________________
> Meteorite-list mailing list
> Meteorite-list_at_meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
>
Received on Fri 03 Mar 2006 12:38:43 AM PST