OK try 5x to 6x the energy requirements ........................
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Gumpert, Ben
Sent: Tuesday, June 06, 2006 4:00 AM
To: [log in to unmask]
Subject: [TN] How much solder is 1000 cc?
John,
I've seen this quote several times now:
"The difference between SAC (the replacement solder) and SnPb (the
leaded
solder) is 453 kg of NRR per 1,000 cc of solder applied. If this were
all automotive gasoline, this difference is equivalent to 162 gallons of
gasoline."
But how much is 1,000 cc of solder? How much solder does the average
walkman, cell phone, microwave, etc. contain? Or perhaps a better
questions are; how much solder does the average consumer purchase per
year or how much solder does the world consume each year? This amount of
gasoline becomes less impressive if it is spread over a number of years
for a single consumer.
Ben
-----Original Message-----
From: John Burke [mailto:[log in to unmask]]
Sent: Thursday, June 01, 2006 4:52 PM
Subject: RoHS article in Boston Globe
Good morning,
I read your article, which was brought to my attention by the members of
the technical forum link on the IPC web site so I have copied this to
them as they may want to fire in some comments too (or maybe not) We are
the people globally that are being impacted by this legislation.
The views below are my views and the opinions are backed up by recent
scientific data form the US EPA.
The RoHS legislation is excellent in every respect but one - taking lead
out of solder.
Removing lead in solder is and will cause a huge hit to the environment
as outlined in a recent US Environmental Protection Agency (EPA) report
which states the following:
"The difference between SAC (the replacement solder) and SnPb (the
leaded
solder) is 453 kg of NRR per 1,000 cc of solder applied. If this were
all automotive gasoline, this difference is equivalent to 162 gallons of
gasoline. Assuming a driver consumes 20 gallons per week, this is also
equivalent to approximately 8 weeks of driving" and note that the
increased environmental impact is from the "green" replacements.
The thought process for lead in solders removal is intuitive. The
reality of the result is counter intuitive - removing it is
environmentally a bad thing...
This sound like a crazy e-mail but the facts speak for themselves all of
which can be found by looking at the http://www.rohsusa.com
<http://www.rohsusa.com/> site and the blogs at
http://www.rohsusa.com/blog which is attracting 300000 hits a month
since it was put up to highlight these issues in April.
The reality is that the EU did NOT carry out any scientific analysis
such as is contained in the EPA report before it brought out this
legislation, and the TAC technical advisory committee who deal with
exemption requests are not technical.
Further, they appear to have dismissed out of hand at least one
exemption request put to the EU commission in 2004 on these very
environmental grounds without looking into the data.
Here is a set of bullet points on the situation and laid out by the
front home page of the web site:-
1. Europe has initiated RoHS in isolation (unlike Kyoto or the Montreal
protocol) and as such has impacted the global electronics market by an
estimated 100 billion dollars. If as a result of this legislation,
electronics becomes very unreliable very quickly. I believe that a
collective of manufacturers could take the Euro parliament to court and
win.
2. Expert opinion says that reliability WILL be an issue and that the
replacements for leaded solder are simply not as reliable as their
leaded predecessors. As this site grows, I will be providing links and
examples of failures if/as they occur. If you have any examples, please
email me.
3. The environment is going to be negatively impacted by the changeover
to lead free. The numbers are available in the August 2005 EPA report.
4. There is going to be wholesale destruction of non-replaceable
forests and other resources as the tin industry continues to struggle to
control unauthorized mining of the raw materials.
5. There is not a shred of evidence to suggest that the change was
necessary or even desirable from an environmental, health, or
engineering standpoint.
And please note that this initiative is driven purely by concern for the
environment and does not have any financial interest in the outcome
either way.
Kind regards,
John Burke
RoHSUSA
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