Abstract
The surface areas of polished and abraded surfaces have been investigated using adsorption from solution of carbon‐14 tagged acetic acid, stearic acid, and N‐ethyl‐N‐perfluoroöctanesulfonylglycine. Adsorption rates, isotherms, heats of adsorption, and desorption characteristics are given for the unique acetic acid system. The effects of abrasion conditions on the surface area of steel have been investigated in detail. Specific surface areas ranging from two up to ten were obtained for various abrasive speeds, loads, and mineral types, and comparable surface areas were obtained for abraded surfaces of glass. Measured areas decreased with increased adsorbate chain length and with increased abrasion temperature. Accordingly, a possible mechanism for abrasion of steel is suggested which involves formation of microcracks. At the higher localized temperatures, more of these surface fissures may become sealed due to surface flow or reaction with oxygen.
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