Brian,
Still using lead in plumbing solder? This was banned in Canada after
lead levels in drinking water were found to be high in drinking
fountains in schools, especially in areas with soft water. In schools
with old plumbing janitors are required to flush the lines before the
children come to school. And, no, I do not remember what the actual
levels found were.
Bev
RIM
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Brian Ellis
Sent: December 15, 2006 4:32 AM
To: [log in to unmask]
Subject: Re: [TN] Need some help please - really quite urgent.
http://www.lme.co.uk/lead_industryusage.asp
World production: 6,701,600 tonnes per annum (2001)
Europe: 28% = 1,876,450 tonnes
Alloys = 1% = 18,765 tonnes
Alloys include solder, brass and bronze, foil, terne metal, type metal,
wire, and other undistributed consumption. (my note: also antifriction
bearing metals)
(http://minerals.usgs.gov/minerals/pubs/commodity/lead/lead_mcs06.pdf)
http://www.paceworldwide.com/leadFree.asp states "The electronic
industry uses less than 0.5% of lead in the production of PCB's and
components" (probably very high estimate). This would offer ~9,000
tonnes.
http://www.avxcorp.com/docs/techinfo/leadfr.pdf states "Despite the fact
that lead containing solders in electronic assemblies account for only
0.49% of world lead consumption". This figure is unsubstantiated, but
confirms the previous one.
I've not found any substantiated data, but it is probable that the
0.49-0.5% data relates to all solder, not just used in the electronics
industry, as the total of alloys is 1%, according to the LME. Despite
restrictions in many countries, lead solders are still used for plumbing
and in the canning industry, as well as for high-melting-point solders,
and for general metal joining. It is probable that Inge's 0.1% is too
low across Europe (Denmark is a pioneer country for LF soldering). My
best estimate would be 0.2 - 0.35% or 3,750 to 6,500 tonnes with
extremes of 1,875 and 9,000 tonnes.
Hope this helps!
Brian
John Burke wrote:
> I have been written to by the Oko institute in connection with my
exemption
> request #15
>
>
>
> They basically want to know how much lead in solder is used in Europe
in
> conventional solder. (Don't they know??)
>
>
>
> I had a response from a leading member of the International Research
> Association of the "other" material used in solder telling me to
contact the
> lead association for the data - hilarious.
>
>
>
> Anyway, I believe I have a number for the amount of solder used
globally
> from a creditable source, what I need now is a SWAG on the percentage
of
> electronics used (note used not made!) in Europe versus the rest of
the
> world so I can give the Oko institute the data they have requested.
>
>
>
> Help please, I have until Friday to come up with the data
>
>
>
>
>
>
>
> John Burke
>
>
>
> (408) 515 4992
>
>
>
>
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