I think the difference between mining and disposal is that when disposed of the lead is in no longer in a stable sulphated state (galena), is closer to the surface, and can leech into the water table. Though anyone who approves a refuse disposal location capable of affecting the water table is negligent to the nth degree.
I agree this stinks of protectionism, and if reliability issues are not readily solved will only cause more ham than good through shortened product life cycles. Tom. > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Brad Velander > Sent: Thursday, 9 December 2004 10:51 AM > To: Open Topic Forum > Subject: RE: [OT] Lead free re design > > Ivan, others, > I am not trying to deliberately extend this discussion > but so far I have not seen any mention of the front end > effects. The mining of Lead and it's associated environmental > issues. Sure it is found naturally in the ground and it has > been there for a long time. So is uranium, radon and a host > of other much more nasty materials but they usually do not > raise a significant health hazard left in their natural > state. Start mining it and now it is in the air, the water, > falling off the sides or backs of dump trucks and conveyors, > washing into streams or water reservoirs. Then you smelt it, > more lead enters the environment. Not to mention all of the > energy input that goes into this process. > > Other metal alloys also have similar energy inputs so > that is not so much a green or greener issue. > > The one issue that I question, I don't have a thorough > knowledge of the details, who's products have lead content > that account for greater than 0.1% of the product weight? > Seems to me that a lot of PCB assemblies are just going to > skirt the whole issue based solely on this weight exclusion. > Any comments? > > > Sincerely, > Brad Velander > Senior PCB Designer > Northern Airborne Technology > 1925 Kirschner Rd., > Kelowna, BC, V1Y 4N7. > tel (250) 763-2329 ext. 225 > fax (250) 762-3374 > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Behalf Of Bagotronix Tech Support > Sent: Wednesday, December 08, 2004 11:56 AM > To: OT Forum (Techserv); "Indrek Rebane" > Subject: [OT] Re: [PEDA] Lead free re design > > > Hi, Indrek: > > > > I enjoy nature and green spaces as much as anyone, but > some of the > > > greenies' ideas of conservation are scientifically unsound. This > > > lead-free solder is one of them. > > > > And your reasoning is? Assume that CRT's and Pb-batteries > are properly > > recycled. > > My reasoning is that lead-free solder joints are not as > reliable over the long term as lead-full solder joints. We > won't know the real facts on this until lead-free has been in > actual field use for several more years. Early indications > do not look favorable, from what I have seen and read. What > good are lead-free products if you have to produce 3 of them > to get the same operational lifetime as 1 lead-full product? > Then there are the costs of service calls, etc. Yes, my > CRT's and batteries are recycled, their cost-benefit ratio > for recycling is good since they contain large amounts of lead. > > > ____________________________________________________________ > You are subscribed to the OT discussion forum > > To Post messages: > mailto:[EMAIL PROTECTED] > > Unsubscribe and Other Options: > http://techservinc.com/mailman/listinfo/ot_techservinc.com > > Browse or Search Old Archives (2001-2004): > http://www.mail-archive.com/[email protected] > > Browse or Search Current Archives (2004-Current): > http://www.mail-archive.com/[email protected] > > ____________________________________________________________ You are subscribed to the OT discussion forum To Post messages: mailto:[EMAIL PROTECTED] Unsubscribe and Other Options: http://techservinc.com/mailman/listinfo/ot_techservinc.com Browse or Search Old Archives (2001-2004): http://www.mail-archive.com/[email protected] Browse or Search Current Archives (2004-Current): http://www.mail-archive.com/[email protected]
