Abstract
To explain the characteristic avoidance of etching on an electropolishing anode, Hoar and Mowat1,2 postulated the formation upon it of a compact solid film, dissolving at its outer surface as fast as it is formed anodically from the metal. We believe we have now obtained direct evidence of the presence of such a film during the electropolishing of copper and α-brass anodes in the 50/50 v/v orthophosphoric-acid/water bath.
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References
Hoar, T. P., and Mowat, J. A. S., Nature, 165, 64 (1950).
Hoar, T. P., and Mowat, J. A. S., J. Electrodepositors' Tech. Soc., 26, 7 (1950).
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HOAR, T., FARTHING, T. Solid Films on Electropolishing Anodes. Nature 169, 324–325 (1952). https://doi.org/10.1038/169324b0
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DOI: https://doi.org/10.1038/169324b0
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