Heat exchanger elements and other chemical processing elements comprising metal coated, heat stabilized impervious graphite

摘要

Impervious graphite tubes, rings and other chemical processing structures made from impervious graphite can be improved with respect to impact strength, safety, shock resistance, pressure capability and heat transfer capability by partially thermally degrading impervious graphite structures and coating the outer surfaces of the treated graphite structures with a layer of metal at an elevated temperature. Upon cooling, the structure is under compression and has the improved properties. Structures are claimed comprising metal armored, partially thermally degraded impervious graphite.