Abstract
LONDON Institute of Metals, March 9.—J. Newton Friend: The relative corrodibilities of ferrous and non-ferrous metals and alloys. (3) Final report. The results of three years' exposure at Southampton Docks. The metals examined included lead, zinc, tin, aluminium, copper, nickel, and various alloys containing iron, chromium, nickel, copper, and zinc. Nickel-copper alloys, particularly the 70:28 alloy, offered great resistance to corrosion. High-grade zinc and tin were slightly more attacked than the less pure metals. Tension, riveting, and cold-working did not appreciably affect the corrosion of nickel-chromium alloy steels, but in every case cracks appeared at welds. Alloy steels resisted corrosion well; they are subject to serious localised corrosion.—O. F. Hudson and J. McKeown: The properties of copper in relation to low stresses. The effect of cold-work, heat-treatment, and composition. (1) Tensile and compression tests under short-time loading. The tensile tests have shown that all the materials tested possess a certain limit of proportionality due to the applied cold-work, and that this limit of proportionality can be considerably raised by suitable heat-treatment. There is a superior resistance to deformation brought about by cold-work and suitable heat-treatment, and also a greater resistance to deformation conferred on copper, particularly at elevated temperatures, by the presence of a very small percentage of silver and also by the presence of tin and silicon.—H. J. Tapsell and A. E. Johnson: The properties of copper in relation to low stresses. The effect of cold-work, heat-treatment, and composition. (2) Creep tests at 300 ° C. and 350 ° C. of arsenical copper and silver-arsenical copper. Improvement in resistance to creep at 300 ° C. and 350 ° C. is effected by the special pre-treatment of the alloys, and alloys containing 0.072 per cent silver are superior to the silver-free alloys.—R: Seligman and P. Williams: The interaction of aluminium and water vapour. The statement having been made recently that aluminium and its alloys are rapidly attacked by super-heated steam at 300 ° C., the authors have made experiments and have found that no such attack takes place under the conditions which they define.—F. Bollenrath: On the influence of temperature on the elastic behaviour of various wrought light metal alloys. The elastic properties increase with decreasing temperature, except in the cases of two aluminium alloys with a high silicon content.—D. Hanson and C. E. Rogers: The thermal conductivity of some non-ferrous alloys. Aluminium-copper alloys were tested, also the effect of aluminium, nickel, iron, phosphorus, and arsenic on the thermal conductivity of copper.—A. J. Sidery, K. G. Lewis, and H. Sutton: Intercrystalline corrosion of duralumin. Partial immersion in a N-l solution of sodium chloride to which 1 per cent (by weight) of hydrogen chloride had been added was capable of producing intercrystalline corrosion consistently in samples of duralumin where a propensity towards this type of corrosion existed. Overstrain in tension increased slightly the tendency towards intercrystalline penetration, but no relation was observed between this tendency and the degree of elongation. In general, the higher the quenching temperature the smaller was the tendency of the material to develop intererystal-line corrosion.
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Societies and Academies. Nature 129, 446–448 (1932). https://doi.org/10.1038/129446b0
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DOI: https://doi.org/10.1038/129446b0