Abstract
o 1. A study of the Bi-Sb alloy system by the cathodic charging curves method showed that three types of oxygen bond are possible on pure bismuth, with oxygen removed at various potentials; while on antimony only one type is observed. 2. The same types of oxygen bond hold good for alloys as for pure metals. Arrests on the charging curves, typical of pure metals, reach far into the alloy region. 3. The rest potential-composition curves showed abrupt jumps in a narrow range of compositions (1–2 at. %) at concentrations which are a multiple of the atomic fraction 1/8— thus illustrating Tammann's n/8 law. 4. The amount of oxygen retained by the surface is greater for pure metals than for alloys. 5. These phenomena can be explained by surface structure characteristics.
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