Accession Number : AD0689012

Title :   WEAR OF SMALL ORIFICES BY STREAMING CURRENT DRIVEN CORROSION,

Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH

Personal Author(s) : Beck,T. R. ; Mahaffey,D. W. ; Olsen,J. H.

Report Date : APR 1969

Pagination or Media Count : 25

Abstract : Wear on the upstream side of small metal orifices subject to large pressure drops (3000 psi) in phosphate ester base hydraulic fluids was found to be the result of an electrochemical corrosion driven by streaming currents. A theory for the production of the streaming current by the flowing fluid is described. Results of the theory are compared with current measurements and observed wear patterns. A large variation of wall shear stress along the metal surface is found to be necessary for the wear. (Author)

Descriptors :   (*CORROSION, *ORIFICES), (*HYDRAULIC VALVES, CORROSION), METALS, HYDRAULIC FLUIDS, FLUID FLOW, PRESSURE, ELECTROCHEMISTRY, STRESS CORROSION, THEORY, MEASUREMENT, WALLS, SHEAR STRESSES, SURFACES, HYDRODYNAMICS, FLUIDICS, REYNOLDS NUMBER, TEST EQUIPMENT, CORROSION INHIBITION, WEAR RESISTANCE

Subject Categories : Fluidics and Fluerics
      Pumps, Filters, Pipes, Tubing, Fittings & Vlvs

Distribution Statement : APPROVED FOR PUBLIC RELEASE