Abstract
An electron micrographic study has been made of iron surfaces subjected to electropolishing. It has been found that although electropolishing produces a relatively smooth surface, the iron is covered with a film. The strengthening of this film by oxidation and its disruption by reduction with hydrogen have been followed. The film is assumed to be oxide and its thickness has been estimated to be approximately 100 Angstrom units. The effect of reduction of the film on surface area and thus on initial oxidation rates of the reduced specimen has been considered.
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