I would ask if the fumes react with the burnt fluxes and increase the health riskes to the operator especially during the maintenance. In the past a lot of de-dross formulas consisted of phosphorous and some of the virgin solders have phosphorous in there as well to reduce dross formation. ----- Original Message ----- From: "stephengregory5849" <[log in to unmask]> To: "TechNet E-Mail Forum" <[log in to unmask]>, [log in to unmask] Sent: Saturday, March 14, 2009 7:53:09 PM GMT -05:00 US/Canada Eastern Subject: Re: [TN] Additive to reduce dross in Wave solder Another question I have is, does the MS2 leave any kind of residues on the pot walls or wave formers? Dross formation has become somewhat a topic of discussion here. It has been noticed that we've been generating more dross with our new Vitronics/Soltec Delta-5 than we did when we had a Technical Devices wave solder machine. I tend to think that is because we've been waving more boards in selective solder pallets than we did in the past, and also partially because of the wave dynamics in the Delta-5...it seems to circulate the solder more. One last question, what do the solder recovery systems cost? Steve ----- Original Message ----- From: "John Goulet" <[log in to unmask]> To: <[log in to unmask]> Sent: Saturday, March 14, 2009 1:27 PM Subject: Re: [TN] Additive to reduce dross in Wave solder With the high cost of LF solder I don't want to add anything and have 1,800 lbs of bad Pb-free solder. I would rather buy a recovery system and return the same good solder into the pot. I also have to be conscious of the safety aspects of the fumes and reaction between the additive with the flux used and the solder. Some of the fluxes have added things so the fumes aren't obnoxious but that doesn't mean they are safe. ----- Original Message ----- From: "Richard D. Stadem" <[log in to unmask]> To: [log in to unmask] Sent: Tuesday, March 10, 2009 12:10:25 PM GMT -05:00 US/Canada Eastern Subject: Re: [TN] Additive to reduce dross in Wave solder No, like I said we do not use this material in the selective soldering process. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Carl Proescholdt Sent: Tuesday, March 10, 2009 9:59 AM To: [log in to unmask] Subject: Re: [TN] Additive to reduce dross in Wave solder Richard, Have you seen any change in bridging or other soldering performance on the selective process due to the addition of this material? Carl -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D. Sent: Tuesday, March 10, 2009 8:22 AM To: [log in to unmask] Subject: Re: [TN] Additive to reduce dross in Wave solder We use this product in our Robotic Tinning Cells made by V-Tek. These cells have automatic dross skimmers on top of the laminar flow solder wells, and when we use this product coupled with our proprietary oxygen evacuation vapor barrier the amount of dross is cut way, way down. It is a good product. We used to use a number of de-oxidizers in our wave solder machine, and this was the last one we used before shutting the machine down. We no longer need to run the wave solder machine because we added selective solder, which uses only the oxygen evacuation vapor blanket over the fountain (no nitrogen needed). But I strongly recommend you try the MS2 in your wave solder pot. It should work better than Oxy-clean and other brands. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Carl Proescholdt Sent: Tuesday, March 10, 2009 7:37 AM To: [log in to unmask] Subject: Re: [TN] Additive to reduce dross in Wave solder John, I am glad you asked this. I just received an advertisement from some company called PKMetal for a "MS2 Molten Solder Surfactant" which is supposed to reduce dross. It worries me to add anything to the pot that might be a pain to deal with later. So...I was wondering the same thing! What's the experience out there? Carl dca -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of john Sent: Tuesday, March 10, 2009 5:04 AM To: [log in to unmask] Subject: [TN] Additive to reduce dross in Wave solder Hi Guys, have you any thoughts on adding an additive to the wave solder pots to reduce dross have any of you had experience with this application I have been asked to look at this and It scares me a little The purpose of this project is to evaluate the two high potential Solder Surfactant/Antioxidant, MS2-200LF & JR07-VI, to get its quantitive and qualitative performance and cost saving in lead-free wave soldering process. JTEC-EUROPE Ltd. Cell / Mobile : +44(0)7921 197 587, Office Dial : +44(0)1355271970, Email: [log in to unmask], Skype: john.jtec P Please consider the environment before printing this email. This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify us by e-mail to [log in to unmask] with a copy of this message. You must not, directly or indirectly, use, disclose, distribute, print or copy any part of this message if you are not the intended recipient. JTEC-Europe Ltd reserves the right to monitor all e-mail communications through its networks. JTEC-Europe Ltd is neither liable for the proper, complete transmission of the information contained in this communication nor any delay in its receipt. 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