Accession Number : ADD018022

Title :   Modified Carbon Improved Corrosion Resistance.

Descriptive Note : Patent, Filed 15 Jan 93, patented 27 Feb 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Edelstein, Alan S ; Everett, Richard K ; Trzaskoma, Patricia P ; Maruyama, Benji

Report Date : 27 Feb 1996

Pagination or Media Count : 7

Abstract : Graphite or carbon particles with a graphitic skin are intercalated with a compound including an oxidized form of a metal and then reduced in a hydrogen atmosphere. This process reduces the driving force for the galvanic reaction between the particles and active metals in aqueous environments. The particles may be present as a reinforcement for a metal matrix (e.g.. graphite/aluminum metal matrix composites) or as a reinforcement for a non-metallic material (e.g., graphite/polyimide, graphite/polyester or graphite/cyanate composites). In the latter case, the composite is adjacent to a metal in a structure. By way of example, the graphite or carbon particle may he a fiber, the metal subject to attack may be aluminum or magnesium, and the intercalation compound may be NiCl2.

Descriptors :   *CARBON, *CORROSION RESISTANCE, *GRAPHITED MATERIALS, *PATENTS, METALS, MAGNESIUM, ENVIRONMENTS, WATER, COMPOSITE MATERIALS, MATRIX MATERIALS, HYDROGEN, NONMETALS, PARTICLES, OXIDATION, ALUMINUM, CHLORIDES, NICKEL, CYANATES, ATMOSPHERES, FORCE(MECHANICS), POLYESTER PLASTICS, POLYIMIDE RESINS, GALVANIC CORROSION

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Polymer Chemistry
      Laminates and Composite Materials
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE