Abstract

Surface modification of a 90Cu10Ni alloy through chemisorption of hydrocarbon to the clean ion-bombarded surface was investigated by means of Auger electron spectroscopy. The amount of volatile hydrocarbon chemisorbed increased with the molecular weight and pressure of the hydrocarbon, but not necessarily with the temperature. The presence of prechemisorbed hydrocarbon on the surface, as determined by the carbon Auger peak, greatly slowed down the rate of oxygen chemisorption. Values calculated for the Elovich constants for oxygen chemisorption yield inferences regarding the mechanism of oxidation inhibition by preadsorbed hydrocarbon.

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