Hi TechNet!
     
     Galvanic corrosion is when you have two dissimilar metals that are 
     connected by a conductive media that generate a potential difference. 
     The less corrosion resistant metal will become the anode and the more 
     corrosion resistant metal will become the cathode - many folks call 
     this electrochemical corrosion. The more dissimilar the metal pair, 
     the larger the potential difference, the more corrosion takes place. 
     Take a look at "Corrosion Engineering" by Fontana and Greene, ISBN 
     #0-07-021461-1 for more info. Yes, you will get galvanic corrosion if 
     you have gold in contact with solder AND a conductive media (i.e. 
     water) is present. What is your use environment? Will a conductive 
     media be present and for what time period? Don't just look at if you 
     have a galvanic corrosion possibility but what is the risk impact 
     based on your use environment and desired functionality. Good Luck.
     
     
     Dave Hillman
     Rockwell Collins
     [log in to unmask] 


______________________________ Reply Separator _________________________________
Subject: Galvanic Corrosion
Author:  [log in to unmask] at ccmgw1
Date:    3/27/97 9:48 AM


     
Hello technetters, I will try this for the fifth time,I apologize if your 
file is loaded with this request, it has been returned to me as undelivered 
mail.
     
If a gold finger with splashes of tin/lead on it "does not" make contact 
within a gold socket, will there be galvanic corrosion.
Unfortunately IPC-A-600 does not address reliability issues, if there is 
reference material out there, I would like to know.
     
*************************************************************************** 
* TechNet mail list is provided as a service by IPC using SmartList v3.05 * 
*************************************************************************** 
* To subscribe/unsubscribe send a message <to: [log in to unmask]>   * 
* with <subject: subscribe/unsubscribe> and no text in the body.          * 
*************************************************************************** 
* If you are having a problem with the IPC TechNet forum please contact   * 
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      * 
***************************************************************************
     

***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]>   *
* with <subject: subscribe/unsubscribe> and no text in the body.          *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact   *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      *
***************************************************************************