By Prodyot Roy, Dragomir Dutina, Frank Comprelli (auth.), Joseph E. Draley, John R. Weeks (eds.)
The Corrosion Resistant Metals Committee and the Nuclear Metallurgy Committee of the Institute of Metals department of The Metallurgical Society of AlME backed a 2-1/2 day symposium on "Corrosion by way of Liquid Metals". The symposium was once held in Philadelphia, October 13-15, 1969, through the 1969 Fall assembly of the Metallurgical Society and the fabrics Engineering Con gress of the yankee Society for Metals. Cosponsors incorporated the yankee Society for Metals and the yankee Nuclear Society. the aim of the symposium was once to collect different features of the topic of corrosion by way of liquid metals, in order that point of view might be supplied at the complete topic, to aid in dividuals facing liquid steel corrosion difficulties gather a valid foundation of knowing, and to supply a chance for dialogue among these doing examine during this box. An exposition of the topic is well timed, in view of the in creasing improvement of liquid steel warmth and gear assets for particular reasons, together with heat-pipe structures, NASA's SNAP strength structures, and the AEC's liquid steel quick breeder reactor method. This publication includes the lawsuits of the symposium divided into 4 separate themes: I. Corrosion of Steels via Sodium, II. Alkali-Refractory steel Interactions, III. Corrosion by means of Non-Alkali Metals, and IV. research of Solid-Liquid steel Inter activities (two sessions).
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Extra info for Corrosion by Liquid Metals: Proceedings of the Sessions on Corrosion by Liquid Metals of the 1969 Fall Meeting of the Metallurgical Society of AIME, October 13–16, 1969, Philadelphia, Pennsylvania
Based on this observation it was concluded that the slowest process in the dissolution sequence is that in which the corrosion products are transferred to the liquid by convective diffusion. Accordingly, a mass transfer coefficient was determined (by analogy between heat and mass transfer phenomena) using an empirical relationship for the heat transfer coefficient in an annulus. In these calculations the effective diffusion coefficient of iron was assumed to be the same as the self diffusion coefficient of sodium in sodium.
Lastly, it should be pointed out that the collection of particulates in the filter suggests that there are large amounts of particulates being carried by the flowing sodium. These particulates in suspension could give rise to the discrepancy between solubility data and the analytical data from grab samples of loop sodium (which is generally higher than solubility data). SUMMARY The physicochemical properties of the deposits formed in a non-isothermal system of flowing sodium are a direct function of the temperature at which the deposit is formed.
The nearly identical loops are of the figure of eight type (heat exchanger) and each contains a cold trap, a hot trap, electrochemical oxygen meters and Na samplers. The test section is located at the hottest point of loop and is connected to a dry box by a flange which permits easy access to the specimens and low contamination cleanup procedure. The test section, shown in Fig. 2, is in a rising temperature region obtained by low voltage, high current heating of the pipe, specimens, and Na. Ten mandrils, each containing 6 specimens, make up the test section.
Corrosion by Liquid Metals: Proceedings of the Sessions on Corrosion by Liquid Metals of the 1969 Fall Meeting of the Metallurgical Society of AIME, October 13–16, 1969, Philadelphia, Pennsylvania by Prodyot Roy, Dragomir Dutina, Frank Comprelli (auth.), Joseph E. Draley, John R. Weeks (eds.)