Union Carbide Corporation

Stephen R Dunne

Joseph P Ausikaitis

William C Miller

Walter P Fethke

The internal corrosion of metal mufflers used in conjunction with internal combustion engines is substantially retarded by maintaining in the external void space thereof an adsorbent mass of a combination of crystalline zeolites having the crystal structure of chabazite and the crystal structure of faujasite. These adsorbent compositions exhibit a synergistic effect on corrosion retardation. Novel muffler devices per se are also disclosed.

Adsorbent composition useful in retarding corrosion in mufflers

A non-catalytic method for extending the life of the metal parts of an automobile muffler which comprises placing an adsorbent mass, preferably of crystalline zeolitic molecular sieve, in the internal space thereof, in sufficient amount to prevent condensation of water vapor from the engine exhaust gases on the walls thereof after engine shutdown. This procedure significantly inhibits corrosion of the metal parts.

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Danbury, CT, United States of America

Stephen R Dunne