Abstract
IT is a well-known fact that the concentration of alloying elements in the scale formed on heating an alloy in air differs in most cases considerably from the average composition of the material. The product of high-temperature oxidation of brass, for example, consists of zinc oxide only. At lower temperatures cuprous oxide is the prevailing constituent1, Iitaka and Miyake found nothing but BeO on the surface of copper-beryllium alloys containing so little as 1 per cent of beryllium. Copper-aluminium alloys with several per cent aluminium content, heated with a Bunsen burner, gave Al2O3 in places which had been embedded in the flame, while CuO was found on those parts of the surface which had been in contact with air2.
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References
Dunn, J. S., J. Inst. Met., 46, 25 (1931). Preston and Bircumshaw, Phil. Mag., 20, 706 (1935). Krupkowski and Jaszczurowski, Rev., Met., 33, 652 (1936) and others.
Iitaka, I., and Miyake, S., NATURE, 136, 437 (1935) and 137, 457 (1936).
See, for example, Adam, N. K., "The Physics and Chemistry of Surfaces" (chapter iv).
Desch, C. H., "The Chemistry of Solids", p. 53.
Dobinski, S., Phil. Mag., 23, 397 (1937).
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DOBINSKI, S. Adsorption of Constituents of a Solid Phase on the Surface. Nature 141, 81–82 (1938). https://doi.org/10.1038/141081c0
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DOI: https://doi.org/10.1038/141081c0
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