tonghh wrote: > > Hello to all technetters : > > Recently I have been trying to figure out the best pretreatment method for > alloy42 materials for further plating processes .Could someone share some > info on this , since alloy42 materials is very sensitive in nature . We > have tried using 5% sulphuric acid and others proprietary chemicals also > sulphuric acid based , the operating window is limited . > > Thanks . > > ############################################################## > 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. > For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 > ############################################################## Tongh, It seems to me that 5% sulfuric is too weak. Try increasing the concentration and/or temperature. You didn't say what is the problem you're trying to solve, so I don't know what else to tell you. Good luck. Dan Brandler, Technical Director, Ohmega Technology. ############################################################## 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. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################