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Corrosion Paste On Terminal Lugs...

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Matt Dralle
Site Admin

Joined: 08 Nov 2005
Posts: 26321
Location: Livermore CA USA

Posted: Wed Sep 16, 2009 9:57 am Post subject: Corrosion Paste On Terminal Lugs...

What's the common practice regarding that white goo for corrosion protection that B&C sells?  I've been gooping up all sides of the posts and connector including the contact faces before I've been bolting these kind of connections together (like the starter lead and battery connections, etc).  I was thinking that it was kind of like heatsink compound where you do just that.  But is that really the right thing to do with this stuff?  Or should it just be added to the outside of the finished connection?  If yes, then what should I do with all of these connections I've already made?



Thanks!



Matt Dralle

RV-8 #82880 N998RV

http://www.mattsrv8.com

Engine Baffling...

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Matt Dralle
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mprather(at)spro.net
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Posted: Wed Sep 16, 2009 10:43 am Post subject: Corrosion Paste On Terminal Lugs...

I think the only place it makes much sense is on the terminals for a

flooded cell lead acid battery..  Applying it to the post before

tightening would provide the best protection and not interfere with

conduction through the joint as long as the hardware is torqued

sufficiently.



I'd guess that the starved cell batteries don't really need the stuff.

Matt-



 	  Quote: 	
		   

 <dralle(at)matronics.com>

 What's the common practice regarding that white goo for corrosion

 protection that B&C sells?  I've been gooping up all sides of the posts

 and connector including the contact faces before I've been bolting these

 kind of connections together (like the starter lead and battery

 connections, etc).  I was thinking that it was kind of like heatsink

 compound where you do just that.  But is that really the right thing to do

 with this stuff?  Or should it just be added to the outside of the

 finished connection?  If yes, then what should I do with all of these

 connections I've already made?



 Thanks!



 Matt Dralle

 RV-8 #82880 N998RV

 http://www.mattsrv8.com

 Engine Baffling...

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Sep 16, 2009 1:49 pm Post subject: Corrosion Paste On Terminal Lugs...

At 12:54 PM 9/16/2009, you wrote:

 	  Quote: 	
		  

What's the common practice regarding that white goo for corrosion 

protection that B&C sells?


	


   If its the same material that was in my catalog

   at the time they purchased my inventory, that "goo"

   is intended as an anti-corrosion, anti-seize treatment

   for threaded fasteners exposed to harsh environment.



 	  Quote: 	
		     I've been gooping up all sides of the posts and connector 

 including the contact faces before I've been bolting these kind of 

 connections together (like the starter lead and battery 

 connections, etc).  I was thinking that it was kind of like 

 heatsink compound where you do just that.  But is that really the 

 right thing to do with this stuff?  Or should it just be added to 

 the outside of the finished connection?  If yes, then what should I 

 do with all of these connections I've already made?


	


   At no place I've ever worked for over 40 years did

   we "goop" any assembled electrical joint. Every joint

   was assembled from shiny, clean, dry components of

   proper material and appropriate plating. Where critical

   mate-up pressures were to be achieved, the work instructions

   called for use of a torque wrench in the final tightening.



   In other words, a connection that's properly crafted is

   so tightly joined that any goop would be extruded out

   of the interface . . . and can only protect the micro-

   thin edges of the interface.



   I have offered the notion that a di-electric grease

   MAY be useful when the OBAM aircraft builder needs to

   make up a high-current joint that is subject to harsh

   environment and/or located in a very hard-to-inspect

   location. 99.9% of all made up electrical joints require

   nor would they benefit from any 'treatments'. Getting

   the necessary force to achieve gas-tight interconnection

   is all that's necessary. Most of those issues are

   addressed for you when you use fast-on terminals, crimped

   or soldered joints, etc. Things held together with threaded

   fasteners have the highest risk of human-factors variables.

   Even those are no big deal if you simply take common care

   for craftsmanship.



   I don't know the qualities of the B&C anti-seize

   compound as a prophylactic against environmental degradation

   of bolted up electrical joints. It MAY be just fine.

   I DO know that plain vanilla silicone grease like

   Dow Corning DC4 or



http://www.super-lube.com/silicone-dielectric-grease-ez-52.htm



   are specific to the preservation of integrity of electrical

   joints. I've got a tube of DC4 that's over 30 years old. I

   use it on my tail-light bulb sockets and I've

   not had one corrode into the socket in many years. But

   I don't find it useful to dope many bolted up electrical

   joints.



        Bob . . .



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

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

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

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