Inhibition of catalyzed oxidation of carbon-carbon composites

Details Inhibition of catalyzed oxidation of carbon-carbon composites Inhibition of catalyzed oxidation of carbon-carbon composites

1993-01-13

1995-03-28

Lovering, Richard D.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

428408, 4273761, C09K 1532

Patent

active

054014409

ABSTRACT:
This invention relates to a composition and method of inhibiting catalyzed oxidation of carbon-carbon composites. The invention includes compositions, capable of impregnating carbon-carbon composites, comprising an aqueous mixture of (a) phosphoric acid, (b) a metal phosphate, and (c) a penetration and retention improving amount of a compatible wetting agent selected from the group consisting of polyols, alkoxylated monohydric alcohols, and mixtures thereof. The invention also includes a method of inhibiting catalyzed oxidation of carbon-carbon composites comprising the steps of treating a carbon-carbon composite with the catalyzed oxidation inhibiting aqueous mixture, and heating the treated carbon-carbon composite to a temperature sufficient to remove water. Articles, including friction brakes, made by this method are also part of this invention. Treated brake lugs, and other exposed areas of aircraft braking systems have improved resistance to catalyzed oxidation.

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