In a message dated 05/15/2000 2:27:27 PM US Eastern Standard Time,
[log in to unmask] writes:

>
>  My question I suppose, how long will it take for an exceptionally clean
> board to fail?
>

Well, my favorite engineering answer is "It Depends".  How clean is the
water?  What is the base metal?

In some water drop research we did in-house, we found that for a bare copper
electrode system, a board that we would define as "clean" would last about
8-10 minutes.  A HASLed board, which was dirty by our guidelines, lasted
about 2-4 and some failed in the first 30 seconds (9 volt battery).

Doug Pauls
CSL

##############################################################
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 Keach Sasamori at [log in to unmask] or
847-509-9700 ext.5315
##############################################################