Foods sensitive to oxydation (like roasted peanuts, chips, coffeee) keep their original fresh flavour and aroma if they are packaged in nitrogen atmosphere. No rancid off-flavours develop in storage. To fill up those small packages (but millions of them) needs continuous nitrogen supply.
Nitrogen atmosphere significantly improve the quality of soldering inprinted circuit board production or in other prduction processes where soldering is neccessary. It became especially important since the lead-free soldering became compulsory in most of the developed countries. Nitrogen can be continuously supplied to the soldering operation by a nitrogen generator.
Molten aluminium reacts with water (or, water vapour from the air) resulting aluminium-oxyde (dross) and hydrogen gas that dissolves in the molten metal. During solidification of cast, hydrogen causes porous structure of the casted part, that must be avoided. Dissolved hydrogen can be removed (degassing) from the molten aluminium by bubbling nitrogen through the molten metal.
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