Accession Number : AD0865621

Title :   Conductive, Lusterless Coatings for Light Metals.

Descriptive Note : Semiannual rept. 16 Jun-16 Dec 69,

Corporate Author : BATTELLE MEMORIAL INST COLUMBUS OH COLUMBUS LABS

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

Report Date : FEB 1970

Pagination or Media Count : 39

Abstract : Four proposed coating systems were examined to select the best candidate for a lusterless, conductive coating on light metals. A system consisting of 0.8 mil of Watts-type nickel and 0.8 mil of porous nickel complied successfully with all the requirements listed in the Technical Guidelines. Gloss index values before and after 100 cycles of abrasion, contact resistance and corrosion resistance were better than the specified limits. Porosity in the second layer was induced by adding colloidal graphite to the plating bath. This porosity reduced reflectance to a lower level than that obtained with porefree nickel deposits.

Descriptors :   (*METALS, COATINGS), (*METAL COATINGS, NICKEL), (*COATINGS, REFLECTIVITY), CHROMIUM, POROUS METALS, POWDER METALS, STEEL, ALUMINUM ALLOYS, MAGNESIUM ALLOYS, ELECTRICAL CONDUCTIVITY, ELECTRICAL EQUIPMENT, CORROSION RESISTANCE, ELECTRIC TERMINALS, SURFACE PROPERTIES, ELECTROPLATING, ELECTRICAL RESISTANCE, GRAPHITE, POROSITY, WEAR RESISTANCE, CAMOUFLAGE, ELECTRONIC EQUIPMENT, ANTENNAS.

Subject Categories : Electrical and Electronic Equipment
      Coatings, Colorants and Finishes
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE