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大流量氮气发生器在WEEE&RoSH法令中的运用
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访问量:733
发表于
2006-08-03 09:33:47
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From 1st July 2006 the RoHS directive that restricts the use of certain hazardous substances in electrical and electronic equipment will come into force.
The new directive affects only products manufactured or sold in Europe, but it has global consequences because it affects manufacturers wishing to sell products in Europe.
The potential health hazards of lead have been understand for many years, however until this directive was proposed, lead was still widely used in the electronics industry. Electronic equipment manufacturers have had a number of years to prepare for this legislation and adjust processes, many have turned to new alloys.
In order to standardize the industry it is recommended that a tin silver copper alloy be used. The liquidus temperature of this new alloy is higher than lead based materials (in the region 220°C), which can cause oxidation that weakens solder joints and results in unreliable components.
A solution is to solder in nitrogen which gives an inert atmosphere that displaces oxygen. Soldering in nitrogen greatly improves joint quality, it also increases wetting force and speed for stronger joints that have minimal voids.
MAXIGAS from domnick hunter is a range of nitrogen generators that produce nitrogen gas from a normal compressed air supply. MAXIGAS operates on the pressure swing adsorption (PSA) principle to separate larger nitrogen molecules from the air stream.
With this system nitrogen is available on-demand 24/7 without the risk of nitrogen supply failures holding up production.
MAXIGAS is a cost effective alternative to other gas sources with fewer on-going costs such as refills, order processing or delivery charges. It is also safer than storing or handling high pressure containers. The system is completely modular, so extra banks of generators can be added as necessary.
domnick hunter are specialists in the manufacture of compressed air treatment equipment including performance filtration that gives absolute particle retention and desiccant dryers than can reach pressure dewpoints of up to -70°C.
Bill Zorlutuna, Market Sector Manager, says, “Most major electronics companies are already using nitrogen, due to the advantages offered&
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