[meteorite-list] WARNING ABOUT Free Dessicant!

From: TMS/TNS/HRC <musnat_at_meteoritecentral.com>
Date: Thu Apr 22 10:14:08 2004
Message-ID: <003001c30c94$c05fc1e0$168c70d1_at_museumst>

Thanks to everyone for the input about my recycled dessicant! I had a
feeling it might be too good to be true....sigh. : ) I suppose you get
what you pay for!

Jeanne Devon








----- Original Message -----
From: "Ron Hartman" <RNHARTMA_at_mtsac.edu>
To: "Fred Olsen" <debfred_at_worldnet.att.net>; "TMS/TNS/HRC"
<musnat_at_alaska.net>; <meteorite-list@meteoritecentral.com>
Sent: Tuesday, April 29, 2003 1:22 PM
Subject: Re: [meteorite-list] WARNING ABOUT Free Dessicant!


> Warning about using silica gel in Rikers and free silica gel.
>
> I speak from experience!
>
> Once the bags of silica are exposed to the atmosphere they adsorb
> moisture(which is their job) and may no longer be effective. You must be
> sure that your silica is thoroughly free of moisture if you want to have
it
> be effective, unless,of course, you want to reheat it. I would never use
> "recycled" silica gel. Its too cheap and my specimens are too valuable to
> chance it.
>
> I used to put silica under the cotton padding in Rikers. I found that,
> since you can't examine it regularly, or the bottom of your meteorite, the
> silica will adsorb all the moisture it can hold, then your specimen will,
as
> mine did, become a rusty mess on the bottom, unless you want to remove and
> inspect it frequently. It doesn't take long for the silica to become
> useless in a Riker mount. Rikers are useless for protecting a specimen.
> The are not tight,and actually trap moisture. The lack of circulation
then
> accelerates rusting. That is why I use only membrane boxes (yes, another
> plug, but that is why I like them!)
>
> Ron Hartman
>
> ----- Original Message -----
> From: "Fred Olsen" <debfred_at_worldnet.att.net>
> To: "TMS/TNS/HRC" <musnat_at_alaska.net>;
<meteorite-list_at_meteoritecentral.com>
> Sent: Monday, April 28, 2003 9:45 PM
> Subject: Re: [meteorite-list] Free Dessicant!
>
>
> > Jeanne,
> > You are just doing a different it. Apples versus Oranges so to speak.
> > Volatile Corrosion Inhibitor, VCI, products are papers and plastics that
> > release volatile chemicals that adhere to iron and forms a protective
> > molecular layer on the surface of the metal. This protective layer
> prevents
> > moisture, salt , dirt, oxygen, and other materials from depositing on
the
> > metal and causing corrosion. I have seen demonstrations where VCI
treated
> > metal is submerged under water for weeks and there was no corrosion,
while
> > an identical untreated piece of iron is severally rusted.
> > It wouldn't hurt to both, but if I were only going to do one, I think
the
> > VCI will be far more effective.
> > Regards, Fred
> > ----- Original Message -----
> > From: TMS/TNS/HRC <musnat_at_alaska.net>
> > To: <meteorite-list_at_meteoritecentral.com>
> > Sent: Saturday, April 26, 2003 8:56 AM
> > Subject: [meteorite-list] Free Dessicant!
> >
> >
> > > I can do cheaper! Shoe stores generally have TONS of little packets
of
> > > dessicant that they will part with for nothing! I tuck a packet
behind
> > the
> > > padding in all my Riker mounts, just in case. Seems to work great,
but
> > then
> > > again Alaska is usually pretty dry.
> > >
> > > Jeanne Devon
> > >
> > >
> > >
> > >
> > > > Hi Bob,
> > > >
> > > > I just saw a brand of kitty litter that was almost totally silica
gel.
> I
> > > > think it was about $10 a bag. I don't remember the poundage of the
> bag,
> > > but
> > > > I suspect it was at least 10 pounds. There was nothing on the bag
> > > indicating
> > > > it was anything more than silica gel.
> > > >
> > > > Anyone know more about this? It could be the cheapest source of
> > desiccant
> > > on
> > > > the planet.
> > > >
> > > > Cheers,
> > > >
> > > > Martin
> > > >
> > > >
> > > >
> > > > On 4/27/03 8:06 PM, "Maccers531_at_aol.com" <Maccers531@aol.com> wrote:
> > > >
> > > > > Can someone please provide me with a source of superior dessicant
> > > products
> > > > > that I may purchase suitable for use in large Riker boxes? I store
> > stone
> > > > > meteorites and irons in them.
> > > > >
> > > > > Thanks
> > > > > Bob
> > > > >
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Received on Sun 27 Apr 2003 04:12:17 AM PDT