Abstract

Abstract The conductometric method is used to study the oxidation of pure iron in the region of 600 C. Iron ribbons of known thickness were used in the tests and the conductance of the central portion of the specimens measured by the potentiometer method. A constant current of 50 ma, small enough to prevent heating even in vacuum, was used. It was found that the conductivity method gives a true measure of the thickness of iron oxidized and yields results that are in agreement with those obtained by the gravimetric method. An analytical method of measuring the amount of unoxidized iron remaining in specimens is described briefly.

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