Hi Rudy! Sorry but I disagree with your statement on tin plating being prone to corrosion when in contact with solder. Tin is only two steps away from tin/lead on most galvanic series charts for fresh and/or seawater thus very little galvanic corrosion potential exists (check out page 32, Fontana and Green, ISBN 0-07-021461-1). Tin also has relatively good corrosion resistance to atmospheric corrosion, weak mineral acids, and many organic acids. The amount of tin plated electronic housings that are in contact in with tin/lead on electronic products is quite large and the number of corrosion cases reported is quite small. Tin has lots of problems in other areas (tin whiskers, tin pest,) but corrosion I don't see as being an area of concern. And yes ":galvanically" is a word (well, my spellchecker thinks it is anyway!). Dave Hillman Rockwell Collins [log in to unmask] Rudy Sedlak <[log in to unmask]> on 11/04/99 06:14:08 PM Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond to [log in to unmask] To: [log in to unmask] cc: Subject: Re: [TN] The Case of Corrosion after Wave Flow Soldering Affair Hans: If you have pure Tin plated pins, electrically in contact with solder, this is VERY prone to corrosion, as you will be getting galvanically (does that word exist?) corrosion. Tin is much more electropositive than solder, and therefore will corrode readily when in contact with solder. Does this help? Rudy Sedlak RD Chemical Company ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################