Accession Number : AD0874981

Title :   Conductive, Lusterless Coatings for Light Metals.

Descriptive Note : Interim rept. (Final) 16 Jun 69-16 Jun 70,

Corporate Author : BATTELLE MEMORIAL INST COLUMBUS OH COLUMBUS LABS

Personal Author(s) : Schaer, Glenn R. ; Layer, Carl H. ; Howe, William E. ; Safranek, William H. ; McCallum, John

Report Date : SEP 1970

Pagination or Media Count : 32

Abstract : Four proposed coating systems were examined to select the best candidate for a lusterless, conductive coating on light metals. A two-layer system consisting of 0.8 mil of Watts-type nickel and 0.8 or 1.0 mil of porous nickel complied with the technical requirements. Porosity in the second layer was induced by adding colloidal graphite to the plating bath. A new technical requirement was added during the program, which limited the color contrast between abraded and unabraded surfaces. All technical requirements including the low color contrast were satisfied when the outer layer was deposited in a nickel-plating bath containing suspended activated-carbon particles with the pH of the solution adjusted to about 2.0.

Descriptors :   *METAL COATINGS), (*ELECTRONIC EQUIPMENT, SURFACE PROPERTIES, NICKEL, POROUS METALS, GRAPHITE, PH FACTOR, CAMOUFLAGE, CARBON, COLORING, ABRASIVES, CORROSION RESISTANCE, POROSITY, REFLECTIVITY, ELECTRICAL CONDUCTIVITY, STEEL, ALUMINUM ALLOYS, ELECTROPLATING, ADHESION, MAGNESIUM ALLOYS.

Subject Categories : Polymer Chemistry
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE