[StenLight-users] Corrosion on Contacts

[Chris and Teresa Anderson]

Some further info from Pat Mudd:

"Hey Chris,
I just checked the Sten connectors and found no corrosion. After a 
Webster trip I spray "CRC Electrical Grade 2-26" on both connectors, 
wipe off excess and let air dry. This spray is safe for plastic. I apply 
"Ideal NOALOX Anti-Oxidant Joint Compound" to the female connector. 
Pointing the nozzle in opening and filling the void to the top. You can 
see the compound entering the connector through the transparence of the 
plastic. I connect the connectors and wipe off the excess. I tested the 
compound with an ohmmeter and found it to be not conductive. I also 
tested the spray with an ohmmeter and found it to be not conductive. Now 
the tests are not precise. But I feel more than comfortable that the 
cell will not short out. One reason is wiping off the excess.
  Do not spray an O-ring with 2-26. It will expand and not fit its 
intended groove. After about three days it may reform its original 
diameter and fit the groove. I have experience this with an O-ring.

Chris and Teresa Anderson wrote:
> David:
> 
> This is "normal". That is, I think it is inherent considering the 
> voltage.  This seems to be a weak point for the Sten. 
> Moisture+voltage=corrosion? Mine does the same thing, as do several 
> owned by friends of mine.  So far, we have not had any issues with this 
> causing a performance problem.  Pat Mudd, whom I cave with, has taken to 
> squirting a conductive water repellent liquid into both female sockets 
> on his Sten.  Seems to have taken care of the problem.  I do not recall 
> what the stuff is called, but it is available at Lowes or Home Depot. 
> It's made for waterproofing electrical contacts I think. I'll see if I 
> can get a brand name. Once injected into the holes, you just plug it up 
> and go.  Keeps water out and reduces corrosion.  Also, make sure you 
> adequately dry the contacts immediately after the cave trip.
> 
> I've not had to clean mine yet, but be careful not to short the cell. 
> Maybe a Q-tip and a non-conductive abrasive like Brasso or the like?
> 
> CG
> 
> David A. Riggs wrote:
> 
>> My StenLight shows green corrosion on the sides of the positive
>> connector terminal. Is this detrimental to its performance, battery
>> life, lifetime? Can anyone recommend the proper way to clean it?
>>
>> -- 
>> David A. Riggs <david.a.riggs at gmail.com>
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