Date: Fri, 10 Apr 2020 12:22:52 -0700
Reply-To: Neil N <musomuso@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Neil N <musomuso@GMAIL.COM>
Subject: Re: Electrical connection prep.
In-Reply-To: <F0D00C6E-492D-467C-B6FE-ECA5E601F951@shaw.ca>
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> As I understand, stabilant ain’t as much a cleaner as a contact enhancer. ....
Thanks for that link Alistair. That's an important difference to note;
I see what you mean:
======
" Stabilant 22 is an electrically active material which stays resident
within a contact-pair, there enhancing conductivity without causing
electrical leakage between adjacent contacts. Although Stabilant 22
does have a detergent action it is not sold as a cleaner, just as it
has a good lubricant action but is not sold as a lubricant. Stabilant
22 is used to increase the reliability of contacts. Tenfold to one
hundred-fold increases are not unusual. At the present time it is used
in many different types of contacts, including card-edge connectors,
D-type connectors, MIL-spec connectors, signal switches, etc.
Stabilant 22 is an initially non-conductive amorphous-semiconductive
polyoxyethylene-polyoxypropyline block polymer with a molecular weight
of about 2800 that, when used in thin films between contacts, acts
under the influence of the electrical field and switches to a
conductive state. The electric field gradient at which this occurs is
established during manufacture so that the material will remain
normally non-conductive. Its switching speed is too slow to allow it
to be used in the more traditional semiconductor applications;
however, this means that signals at frequencies substantially above
five cycles per hour will not be modulated by the switching
characteristics of Stabilant 22.
Thus, when applied to electromechanical contacts, Stabilant 22
provides the wide-bandpass connection reliability of a soldered joint
without bonding the contacting surfaces together!
In its undiluted form at room temperature, Stabilant 22 has the
viscosity of medium-weight motor oil, although it thins out with
increasing temperature, starting to decompose into the two polymers it
is formed from at about 240° Celsius. It has a very low vapor pressure
and therefore there is no appreciable loss of material from
evaporation. It has been in some applications for more than fifteen
years without renewal, and it is probably safe to say that in the
majority of cases, the equipment on which it is used will be retired
as obsolescent before the Stabilant must be renewed. "
--
Neil n
VE7TBN
1988 Westy 50º ABA swap: https://tinyurl.com/yap5hpwt
1981 Westy 15º ABA swap: https://tinyurl.com/y9n4xob8
VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>
