The pubffcation costs of this article have been assisted by the Lockheed Corporation. Transport modes were determined from examinations of morphology for electrochemical oxidation and reduction within electrodes consisting of beds of silver spheres 37.2 ~m in diameter in IN KCI and subjected to 5.0 mAcm-2 applied current density. Oxidation proceeded via silver dissolution, probably at dislocation sites, followed by diffusion and, then, deposition of AgCI in characteristic, bulbed mounds which grow together to form layers of ap-p rox imate ly uniform thickness. AgC1 film thickness, for the case of partial ly covered underlying silver, was about 3500A and distance from silver dissolu-tion pits to Age1 deposition sites was found to be increased from 4,000 to 40,000A as the local transfer current density became larger within the sphere bed. Reduction of anodically formed AgC1 on partial ly covered silver pro-ceeded by an opposite path: solution and diffusion of AgC1, and deposition of silver on preferred sites of surrounding bare silver surface.
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Katan et al. (1974) studied this question.