The solder plating has no barrier layer? I assume that it is not fused either. Then the copper from the bronze has migrated to the surface of the porous solder plating and has oxidized. It is doubtful that you can wave solder the terminals in this condition with no-clean flux. The terminal may require stripping. Did you question the manufacturer about the difficulty in soldering? They may have some suggestions. Al Cash ---------- From: Kathy Stillings [SMTP:[log in to unmask]] Sent: Tuesday, June 15, 1999 10:49 AM To: [log in to unmask] Subject: [TN] Lead solderability Hi technetters, Hope all is well..................... Got a quick question - I am using Power chip resistors (manufacturers name with held :) ) that have a "solder plated phosphor bronze" terminal. I am having a bugger of a time soldering these parts. I have limited solderability testing capabilites and am forced to use the old solder pot test to verify solderability. I get good solder adhesion on some and very poor on others. I don't have any experience with phosphor bronze based terminals. I am looking for your expertise on how I can wave these parts. Note: leads are very dark in color as if they are contaminated but the date codes on the parts is very new. Oh yeah - sodler is 63/37 with no clean alcohol base flux spray. Thanks again in advance for the help! ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################ ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################ ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################