Abstract
The rate of dissolution of iron from rotating cylinders was studied in containing purple and green , also and up to 0.2M. These salts affect the rate of dissolution somewhat, but chromic ion does not undergo reduction. While the standard potentials predict that reduction is possible, the actual potential of iron in acid solutions is not sufficiently negative. Cathodic polarization did not accomplish direct or indirect reduction of chromic ion, but only cathodic protection of the iron. It was also shown that metallic iron catalyzes the oxidation of chromous ion by hydrogen ion.
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