Abstract
WORK is being done in this laboratory on various atmospheric corrosion problems. An apparatus has been set up which measures corrosion-rates by following the oxygen consumption. This apparatus will be described elsewhere. During early stages of this work, an investigation was carried out to find a suitable method for cleaning specimens so that repeated use could be made of them. It was found then that treatment of specimens of enamelling iron (C = 0·01, Ni = 0·1, Cr = 0·1, Si = 0·005, Mn = 0·14, trace Cu, Sn, As, Al and Ca) in hot dilute hydrochloric acid gave fairly reproducible corrosion-rates using half-normal sodium chloride solutions in the apparatus. Treatment in cold concentrated hydrochloric acid reduced the corrosion-rate of the specimens to a value approximately one and a half times less than the rate after treatment in the dilute acid.
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References
Guitton, L., C.R. Acad. Sci., Paris, 203, 1254 (1936).
Müller, W. J., and Machu, W., Z. Elektrochem., 41, 641 (1935).
Yamamoto, Inst. Phys. Chem. Res. Bull. Tokyo, 17, 517 (1938).
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WHITTON, W. Oxide Films Formed on Pure Iron in Concentrated Hydrochloric Acid. Nature 163, 763–764 (1949). https://doi.org/10.1038/163763a0
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DOI: https://doi.org/10.1038/163763a0
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