[meteorite-list] Rust Question about my stone meteorite. BKF is the best :)

Mon Sep 13 15:06:59 EDT 2010

Hi List,  I must agree with Shawn on this  one.  

Does any one know of a case where a meteorite came out of an  end 
collectors collection to be used in any way in research?  I am not  talking about 
Bob's 1st Lunar or Adams giant Lunar (These guys are not the end  collectors). 

Any thing that does not degrade the sample and cause damage  but makes it 
more pleasant to display in ones collection is a good  thing.

Tom Phillips

In a message dated 9/13/2010 11:48:36  A.M. Mountain Daylight Time, 
photophlow at yahoo.com writes:
Hi Martin and  Listers

Martin BKF is an acid and nothing more.... The acid doesn't  bleach the 
surface and the active ingredient is oxalic acid, naturally occurs in  plants 
and animals. The acid acts like an accelerant to the surface by stripping  
away the rust. The oxalic acid is nothing more then acid rain on steroids. But 
 in this case the rust is stripped away from the meteorite, preserving the  
meteorite. 

As for making the meteorite worthless for being used  for science, I think 
we can leave that up to the scientists, and to be honest, I  think most 
meteorites in peoples collections are void because I bet scientist  have strict 
rules on handing and storage of meteorites. But again I am not a  scientist 
nor are most people on the list. But at any rate, if a scientist was  going 
to use the L6 meteorite for research, I think that they would use an acid  
as well to strip the surface away to get to the good stuff in the middle :)  

As for changing a weathered meteorite from a W4 to W0 is probably  
impossible if the meteorite is a W4. The reason is because the weathering isn't  
superficial and the weathering is through out the meteorite. You would have to  
strip down the meteorite to nothing. Now do I say that everyone go out and 
do  this no, but what I do say is if your confident and know what your doing 
then do  it because rust for a meteorite can spell trouble.

As for devaluing  a meteorite for research, Martin again I have to say that 
most meteorites that  people own could be deemed as worthless because of 
how they are handled, cut,  sliced, buffed and stored. But again I don't think 
we all have a science lab in  our bedrooms performing science experiments 
on our meteorites. If any thing I  was able to stop the process of the 
meteorite from rusting and restore the  surface to its original form. In that 
regard I am able to identify the meteorite  from its physical features now, 
making the L6 more important from a scientific  observation stand point and 
because I can see the meteorite and not rust from  old age. 

Science 101, to stop an acid one can use a neutralizer  aka water

Shawn Alan 
IMCA 1633 
eBaystore  
http://shop.ebay.com/photophlow/m.html?_nkw=&_armrs=1&_from=&_ipg=&_trksid=p

4340  

[meteorite-list]  Rust Question about my stone meteorite. BKF is the best 
:)Martin Altmann altmann  at meteorite-martin.de 
Mon Sep 13 08:24:16 EDT 2010 

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Humhem...please! 

No offense. It's  absolutely you're private affair, what you're doing with 
your meteorites.  

Though in general I think it's a big No-No to manipulate stony  meteorites 
that way, to artificially bleach them. (Just was looking, "Bar  Keeper 
Friend"s main reactive agent is oxalic acid). 
Stone meteorites  are no irons. In my opinion such a treatment will make 
them 
to a certain  degree worthless, 
as they can't be used anymore for scientific measurements.  

What I would urgently expect, is to avoid, that such bleached chondrites  
would be brought in circulation. 
The meteorite sector, other than the  minerals and fossils sector, all in 
all 
was so far relatively spared from  manipulated or fudged specimens. 

It would be in my very personal opinion  everything else than good, that 
W2, 
W3, W4 material now would be pimped to  be suggestive of being a W0 or a 
W1. 

I hope we all can agree about?  
Worried 
Martin 

-----Ursprüngliche Nachricht-----  
Von: meteorite-list-bounces at meteoritecentral.com  
[mailto:meteorite-list-bounces at meteoritecentral.com] Im Auftrag von 
Shawn  
Alan 
Gesendet: Montag, 13. September 2010 07:59 
An: meteorite-list  at meteoritecentral.com 
Cc: Jimski47 at aol.com 
Betreff:  [meteorite-list] Rust Question about my stone meteorite. BKF is 
the 
best :)  

Jim k and the List, 

I took your advice and  used the Bar Keeper Friend on my L6 meteorite 
fragment to remove the rust on  the surface of the meteorite due to age and 
I 
would have to say, wow, this  stuff really works. The meteorite looks so 
much 
better. I can see the true  color of the meteorite, I can see the texture 
and 
the gray matrix. I have a  link down below of before and after images of 
the 
meteorite :) Take a look  and you will be amazed of the results. 

http://www.flickr.com/photos/48262799@N03/4985819064/sizes/l/in/photostream/

Shawn Alan 
IMCA 1633 
eBaystore  
http://shop.ebay.com/photophlow/m.html?_nkw=&_armrs=1&_from=&_ipg=&_trksid=p

4340 

[meteorite-list] Rust Question about my stone meteorite.  
Jimski47 at aol.com Jimski47 at aol.com 
Sat Sep 11 07:38:57 EDT 2010  

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Hi Shawn, 

I doubt that soaking a meteorite in alcohol will  remove rust. I've used 
fine grit sandpaper to remove rust from slices. Lay  the sandpaper on a 
hard 
flat surface and gently rub the meteorite onto the  sandpaper. For removing 
rust from iron etched slices, I use a product called  "Bar Keepers Friend", 
this can be found in most grocery stores cleaning  supplies isle. It comes 
in 

a powder form, so you have to make a thick  liquid out of it. Wet the 
meteorite with warm water then apply the liquid  BKF. Rub it onto the 
meteorite 
with your finger gently. Rubbing to hard  can damage the etch. After 
removing 

the rust, rinse the piece, soak it  in alcohol and bake it dry in an oven 
about 200 degrees for 2 hrs.  

You can try the BKF process on a chondrite fragment and use a toothbrush  
to scrub it. It should work but you might want to experiment with a cheap  
uncl. NWA first. 

Jim K 

In a message dated 9/10/2010 11:14:49  P.M. Central Daylight Time, 
photophlow at yahoo.com writes: 
Hello  Listers, 

I have a question about rust and how to clean it off your L6  meteorite. 
Now can you just soak the meteorite in a 99% alcohol bath for a  couple 
days 
and the rust on the surface will some what come off the surface  or are 
there 

other steps? 

The the size of the L6 fragment is  3.45g, so I dont have much room to work 
with. I used a sand/finger nail file  and sanded the surface, but not sure 
if that made a difference and it seems  that the L6 meteorite surface is 
stronger than the sand paper on the finger  nail file. 

If any Listers have some suggestions let me know please :)  

Shawn Alan 
IMCA 1633 
eBaystore  
http://shop.ebay.com/photophlow/m.html?_nkw=&_armrs=1&_from=&_ipg=&_trksid=p

4340 
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