Accession Number : AD0659186

Title :   INVESTIGATION OF CAVITATION EROSION RESISTANCE OF METALLIC AND NON-METALLIC MATERIALS AND POLYMERIC COATINGS USING A ROTATING DISK APPARATUS.

Descriptive Note : Progress rept. 5,

Corporate Author : NEW YORK NAVAL SHIPYARD BROOKLYN MATERIAL LAB

Personal Author(s) : Lichtman,J. Z.

Report Date : 01 DEC 1958

Pagination or Media Count : 55

Abstract : A series of metallic and plastic disks and coated metal disks were tested to determine their resistance to cavitation erosion by means of a rotating disk apparatus. A considerable variation in erosion resistance was observed, manganese nickel and nickel aluminum bronzes showing the highest resistance among the metals. Aluminum 1100-0 and most of the plastics showed the poorest resistance while a neoprene coating exhibited the highest erosion resistance of all the materials tested. Erosion damage increased exponentially with increase in velocity of the cavitational sources (holes) in the disk. The threshold velocity (below which no measurable damage was obtained) decreased with increase in test time. The degree of adhesion of the coatings to the metallic substrate was a vital factor in determining the erosion protection afforded by the coatings. (Author)

Descriptors :   (*CAVITATION, *EROSION), ALUMINUM ALLOYS, PLASTIC COATINGS, RUBBER COATINGS, COMPOSITE MATERIALS, STEEL, STAINLESS STEEL, BRONZE, BRASS, POLYVINYL CHLORIDE, HALOCARBON PLASTICS, SYNTHETIC RUBBER, EPOXY RESINS, GLASS TEXTILES, AGING(MATERIALS), NYLON, WEAR RESISTANCE

Subject Categories : Ceramics, Refractories and Glass
      Laminates and Composite Materials
      Metallurgy and Metallography
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE