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Di-Electric Grease; where used

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w_sweet(at)comcast.net
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Posted: Sun May 14, 2006 6:13 am Post subject: Di-Electric Grease; where used

My other toy is a motorcycle, which has electronic everything. Some =

riders strongly advocate to apply dielectric grease the connectors for =

corrosion protection. But a dielectric is a non-conductor; seem =

counter-productive. What am I missing here?

Wayne

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retasker(at)optonline.net
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Posted: Sun May 14, 2006 7:37 am Post subject: Di-Electric Grease; where used

It has to be a non-conductor or you would short every pin to every other 

pin.  The purpose of the grease is to exclude oxygen and moisture - both 

of which are needed to degrade the contacts.



Dick Tasker



Do not archive



Wayne Sweet wrote:



 	  Quote: 	
		  



My other toy is a motorcycle, which has electronic everything. Some =

riders strongly advocate to apply dielectric grease the connectors for =

corrosion protection. But a dielectric is a non-conductor; seem =

counter-productive. What am I missing here?




	


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mprather(at)spro.net
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Posted: Sun May 14, 2006 8:03 am Post subject: Di-Electric Grease; where used

Hi Wayne,



Here's my understanding:



Properly designed electrical connectors make gas-tight connections 

between the conductors.  This means that as well as squishing all of the 

air out of the interface, closing the connection will also squish out 

any other liquid/grease in the joint, including dielectric grease.  

Applying dielectric grease to a properly designed connector will not 

interfere with the conductive properties of the joint because the grease 

will get squished out of the places where the joint is gas-tigth.  

However, applying dielectric grease may stave off corrosion at the 

margins of the joint.  At the margins (edge) of a connection, there may 

exist narrow (microscopic) crevices/voids, which can be the perfect 

environment for corrosion of the materials used to make the connection.

Regards,



Matt-



Wayne Sweet wrote:



 	  Quote: 	
		  



My other toy is a motorcycle, which has electronic everything. Some =

riders strongly advocate to apply dielectric grease the connectors for =

corrosion protection. But a dielectric is a non-conductor; seem =

counter-productive. What am I missing here?

Wayne

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nuckollsr(at)cox.net
Guest

Posted: Sun May 14, 2006 11:39 am Post subject: Di-Electric Grease; where used

At 07:07 AM 5/14/2006 -0700, you wrote:



 	  Quote: 	
		  



My other toy is a motorcycle, which has electronic everything. Some =

riders strongly advocate to apply dielectric grease the connectors for =

corrosion protection. But a dielectric is a non-conductor; seem =

counter-productive. What am I missing here?

Wayne


	


   Dow-Corning DC-4 and similar silicone greases are

   excellent prophylactic treatments for exclusion of

   moisture and other contaminants into connectors.



   Waaaayyyy back when, we commonly filled the mating

   spaces of coax connectors up on towers with DC-4 before

   putting the connector together. Use sparingly. You don't

   want it to ooze out and get the exterior all messy. The

   stuff is VERY hard to get off and in the case of coax

   connections, made it difficult to wrap with tape for

   exterior water-barrier.



   A coating the top insulator and terminal of a spark

   plug before installing the spark plug wire would be

   an assist for keeping moisture out of a potentially

   vulnerable joint in the system. Same thing would be

   good for coil end of wire.



   Silicone greases migrate with time. Put a pea-sized

   dab on a flat surface and come back a few months later.

   You'll find a large silicone-grease wetted area around the

   dab that continues to grow with time.



   It's a neat stuff but I would use it reservedly with

   respect to amount and location and only in areas where

   a connection is likely to be exposed to extra-ordinarily

   corrosive influences.



   Bob . . .



      ---------------------------------------------------------

      < What is so wonderful about scientific truth...is that >

      < the authority which determines whether there can be   >

      < debate or not does not reside in some fraternity of   >

      < scientists; nor is it divine. The authority rests     >

      < with experiment.                                      >

      <                            --Lawrence M. Krauss       >

      ---------------------------------------------------------

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