Abstract
Stearic-1- 14C acid was adsorbed as close-packed monomolecular layers on metallographically polished iron, nickel, chromium, and AISI types 304 and 416 stainless steels. Measurements of the adsorbed radioactivity allowed the determination of the number of adsorbed molecules per unit area and the effective area per molecule on each of the metals. Desorption and exchange experiments indicated two types of adsorption bonding in these systems; the relative amounts of each bonded type were determined for each metal. Methylene iodide contact angles were measured on both freshly prepared, completely intact monolayers and on monolayers which had been partially depleted during the desorption process. These measurements have allowed the determination of the variation in the magnitude of the contact angle as a function of surface coverage.
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