Coating formulation and method for refinishing the surface of surface-damaged graphite articles

Patent · Tue Nov 22 00:00:00 EST 1988

OSTI ID:7166838

Ardary, Z L; Benton, S T

The described development is directed to a coating formulation for filling surface irregularities in graphite articles such as molds, crucibles, and matched die sets used in high-temperature metallurgical operations. The coating formulation of the present invention is formed of carbon black flour, thermosetting resin and a solvent for the resin. In affixing the coating to the article, the solvent is evaporated, the resin cured to bond the coating to the surface of the article and then pyrolyzed to convert the resin to carbon. Upon completion of the pyrolysis step, the coating is shaped and polished to provide the article with a surface restoration that is essentially similar to the original or desired surface finish without the irregularity.

• DOE Contract Number: W-7405-ENG-26
• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 4786524; A
• Application Number: PPN: US 7-071102
• OSTI ID: 7166838
• Resource Relation: Patent File Date: 8 Jul 1987
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COATINGS
CHEMICAL COMPOSITION
DEPOSITION
GRAPHITE
SURFACE FINISHING
CARBON BLACK
PYROLYSIS
RESINS
ROUGHNESS
CARBON
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTAL MINERALS
ELEMENTS
MINERALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
360601* - Other Materials- Preparation & Manufacture