The formula for WD40 is secret. however...
"...WD-40 literally stands for Water Displacement, 40th attempt..."
http://www.wd40.com/faqs/
WD40 does not contain water... ;)Wouldn't it seem counter intuitive to
add water to a product which displaces water?
Wired Science article about the ingredients of WD40:
http://www.wired.com/science/discoveries/magazine/17-05/st_whatsinside
"...What does WD-40 contain? - While the ingredients in WD-40 are
secret, we can tell you what WD-40 does NOT contain. WD-40 does not
contain silicone, kerosene, *water*, wax, graphite, chlorofluorocarbons
(CFCs), or any known cancer-causing agents..." http://www.wd40.com/faqs/
Nantan has a bad rep for rusting, however, usually only the outer
surface of the irons are rusted. Smaller irons rust deeper into the
interior of the metal in relation to it's size. The level of oxidation
depends on the size of the specimen and partly on "where" within any
given specimen the slice is cut from. The treatment and prep work on a
finished piece of etched Nantan also plays a large part in whether it
rusts or not.
Regards,
Eric
On 12/6/2010 10:11 AM, Gary Fujihara wrote:
I wouldn't use WD40 on any mets, as it contains water and smells. Like Al
mentioned, a good low viscosity gun oil like Remington Rem-Oil wipes work well
without any aroma. As an added bonus the application wipes clean mets while
lubricating them.
Also, as Matt mentioned, there are problem and stable specimens from most any
iron or pallasite meteorite. Another factor is how they were prepared. And
its not just irons and pallasites, as I've had Ghubaras and Tsarevs that self
destruct by themselves.
gary
On Dec 6, 2010, at 8:00 AM, al mitt wrote:
Hi Ed and all,
This has been discussed before and I believe the consensus was that WD40 can
have moisture in it that will promote rust. It depends on the batch but there
is varying degrees of water contained in this lubricant. It might not be so
good for Nantans but more stable irons like Gibeon would probably be fine.
A good grade gun oil like Birchwood brand, Barricade seems to do better in my
experience but smells a bit. Bottom line here, Nantans are often unstable and
may have been weathered to the point you'll never be very successful at drying
them out. These are notorious rusters.
I like very much your idea of a list of meteorites that are problems specimens.
Perhaps we could develop a rating system (1 to 10), (stable, mostly stable,
partly stable, unstable, extremely unstable) or something similar and a listing
of specimens. Even the metal in ordinary chondrites can rust. An example is
Ghubara, Omen. About half of the pallasites out there are problem specimens,
and a number of irons are.
Best!
--AL Mitterling
----- Original Message ----- From: "Ed Majden"<epmaj...@shaw.ca>
To:<meteorite-list@meteoritecentral.com>
Sent: Monday, December 06, 2010 12:28 PM
Subject: [meteorite-list] List of known Rusters?
Does anyone have a list of known Iron meteorite rusters? The sample of Nantan
China I have split into several pieces. I have been using WD40 on the pieces
to retard further problems but this does not work all that well. Have to
repeat this every few weeks!
Ed Majden
Courtenay B.C.
Asteroid Majden 142368 (Thanks to Rob Matson)
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Gary Fujihara
Big Kahuna Meteorites (IMCA#1693)
105 Puhili Place, Hilo, Hawai'i 96720
http://bigkahuna-meteorites.com/
http://shop.ebay.com/fujmon/m.html
(808) 640-9161
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