The situation represents heating in a reducing atmosphere. As a result of this heating, oxides of tin and lead are reduced. Bright shiny solder!!! I don't think it completely replaces all the functions of flux and oxygen entry could go Boom! Have Fun, Fred ______________________________ Reply Separator _________________________________ Subject: Re: [TN] Hydrogen/Nitrogen saftey issues Author: "TechNet E-Mail Forum." <[log in to unmask]>, [log in to unmask] at corp Date: 8/17/98 12:39 PM Dennis (and others) if I may ask, why do you want to put this mix in your reflow oven. What assembly process/technolgy is this used for? I asked a question on technet several months ago about using nitrogen/hydrogen in the reflow process, because I was told that the hydrogen, at temperatures above 300C (or 350C from another source) will actually clean the surface of an area to be soldered, thus eliminating flux. Obviously at this temperature, you would need a high temp solder, and components that can withstand the high temperatures. Curious minds want to know, who is using this, and why? It is my understanding that Electrovert has investigated this, but my contact person did not say much. I think they are still investigating. CURIOUS MINDS WANT TO KNOW!!!!!!!!!!!!! [log in to unmask] on 08/17/98 02:39:36 PM Please respond to [log in to unmask]; Please respond to [log in to unmask] To: [log in to unmask] cc: (bcc: Ed Holton/Hella North America Inc.) Subject: [TN] Hydrogen/Nitrogen saftey issues From: Dennis J Fall@TFT on 08/17/98 01:39 PM To: [log in to unmask] cc: Subject: Hydrogen/Nitrogen saftey issues I am looking for some information regarding the safety of reflow ovens using a 15% Hydrogen 85% Nitrogen atmosphere. If anyone has had experience using this concentration or something close to it, please let me know. Maybe we can discuss any safety issues that may pertain to the process. Thank You, Dennis Fall P: 507-625-8445 x17 Process Engineer F: 507-625-3523 Thin Film Technology Corporation mailto:[log in to unmask] 1980 Commerce Drive http://www.thin-film.com North Mankato, MN 56003-1702 ################################################################ 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 ################################################################ ################################################################ 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 ################################################################