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    Fretting Corrosion Tendencies of Several Combinations of Materials

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    A large number of combinations of materials, both metallic and nonmetallic, were subjected to conditions producing fretting corrosion in an effort to evaluate their comparative susceptibility to this action. A table is given listing the results in three groups of relative resistance. Observations were also made to determine qualitatively the effect of such variables as velocity of slip, pressure between surfaces, amount of slip, and surface finish. All rigid materials were found either to corrode with oxide debris or to be affected by a fretting action which roughened the surface. Two contradictions to published data were found in that magnesium on cast iron is a poor combination and that surface roughness has little effect. Some nonmetallic materials are worse than metals. Dry lubricants delay the action, whereas rubber cement by excluding air prevented corrosion during the test life. A rubber gasket completely stopped the corrosive action.

    Author Information:

    McDowell, J. R.
    Research Engineer, Westinghouse Research Laboratories, East Pittsburgh, Pa.

    Committee/Subcommittee: D02.L0

    DOI: 10.1520/STP46115S