Galvanic cells employing compressible gaskets having at least a portion of the sealing areas of such gaskets coated with plasma deposited fluorine atoms demonstrate increased resistance to electrolyte leakage....http://www.google.fr/patents/US4501805?utm_source=gb-gplus-shareBrevet US4501805 - Galvanic cell having a saturated fluorocarbon plasma-treated sealing gasket
Galvanic cell having a saturated fluorocarbon plasma-treated sealing gasket