Phil mentioned: >i really doubt that your customer would accept your nitric acid, acetic acid >cleaning process without data to backup your capability to clean up the >cleaner. i mean this stuff will eat up copper. nothing like flying around >in an aircraft while residues are eating away at your electronics. Ouch! Yes, I'd recommend against this too. In a previous life, dipping a PDP11 module (ok, so it was an OLD previous life!!) into a weak acid solution to clean off some organic flux residue resulted in electro-plating shorts between the leads of cerdip parts. The boards had come right off test, and likely had charge still in various caps, etc... I delidded the parts, sheared the bond wires and low resistance shorts still existed between pins. A 5% visual reject rate became a 80% functional failure rate, and we ended up scrapping the entire run. (the manufacturing engineer who had come up with this idea was VERY popular for a couple weeks!!") The moral of the story was "beware of getting any acid solutions anywhere near a populated PWB"... John John Brewer Component Engineering Supervisor Square D Company [log in to unmask] ############################################################## 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 ##############################################################