DISSOLUTION BEHAVIOR OF Fe AND Ni IN THE ACTIVE REGION OF DISSOLUTION IN SULFURIC ACID
AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OH
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The dissolution characteristics of high purity Fe and high purity Ni in H2SO4 at 25C were investigated using atomic absorption analysis. The specimens were dissolved potentiostatically and samples of solution were analyzed for Fe and Ni ions. The analyses showed that the dissolution was a logarithmic function of time, the exponent of time being about 1.0 for Fe and 0. 7 for Ni. Anodic polarization curves indicated that dissolution of Fe was larger than for Ni. The mechanism for Fe involved two electrons whereas, for Ni it involved three electrons. Determination of zero-order rate constants indicated that the constants for both Fe and Ni increase with potential, the constant for Fe at a given potential always being much larger than the constant for Ni.
- Properties of Metals and Alloys
- Atomic and Molecular Physics and Spectroscopy