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Metallurgy Division - Semiannual Prog Rpt [Apr 10, 1954]

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Extra info for Metallurgy Division - Semiannual Prog Rpt [Apr 10, 1954]

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6. P. , J. V. Cothcart, and W. H. Bridges, Mor. &or. Prog. Rep. April 30, 1952, ORNL-1302, p 59. 52 Fig. 43. paratus. Fused-Hydroxide Corrosion Test Ap- - PERIOD ENDING APRIL 10, 1954 r i g i s now being constructed which w i l l accelerate gathering o f the data. Sodium-Alloy Flammability M. E. Steidlitz I - G. P. Smith S t u d i e ~ 'of ~ the flammability of iets o f sodium alloys in moist and dry air at temperatures up t o 8OOOC have been continued. A s mentioned previously, the test o f combustion wa5 whether or not a luminous fire was produced.

Tests, have been run t o compare the corrosion resistance of two types o f graphite i n molten sodium at 816OC for 100 hr in a static system with type 304 stainless steel being used as the container One type of graphite tested was C-18 de graphite) and the other type was tar-impregnated and fired 16 times during i t s preparation. The purpose o f the repeated impregnation and firing i s t o produce a high density and “tough skin” which could possibly help to Fe, depth of 5 to 10 on S t e l l i t e t o o mils groin boundaries up to 15 m i l s i n depth to on S t e l l i t e , 0 to 13 1 /2 m i l on S t e l l i t e ‘ 1 to / m i l i n depth 2 to 5 m i l s on S t e l l i t e to 23 m i l s reduce penetration by various liquid media.

The maximum attack found i n the \-in. /cu in. (loop 359), which had been f i l l e d from the same batchof fluorides as the other two, was a moderateLoop 362, also o f to-heavy attack of 4 mils, k-in. tubing, showed a similar attack t o 31/2 m i l s with a few areas extending t o 5 mils. A linear relationship i s not obtained when attack vs ratio With a thermal convection loop, both i s plotted. the velocity and temperature drop change w i t h any change i n pipe size. Variations in these quantities probably cause the deviation from the stroight line.

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