Evaluation of hastelloy N alloys after nine years exposure to both a ...

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A 12 HASTELLOY N-2X.Nb WITH HASTELLOY N-2% Nb WELD ROO HASTEL+WN-2%Nb TUBING MSTEW N-22Nb WELDED WtTH HASTELW N-2UNbWELD ROO REGULAR HASTELLOY N TUBING Fig. 11. Micrographs of tubing and specimens from loop 1255 exposed to LiF-23 mole % BeF2-5 mole % ZrF4-l mole % ThF4-l mole % UF4 molten salt at 560-700°C for 9.2 years. As polished. SOOX. RedLd 15%. I Y 112590 .
! - ! a j 5 I i 1 ~ I . &J I c i * I . ! i 1 (a) 13 Fig. 12. Inside surface of modified Hastelloy N-2% Nb insert specimen, exposed to salt at 687-700°C. Location A, Fig. 11. tu) As polished, (b) etched with glyceria regia. Fig. 13. Inside surface of standard Hastelloy N insert specimen, exposed to salt at 665-68PC. Location B, Fig. 11. (u) As polished, (b) etched with glyceria regia. j X 0 I- d
Page 1 and 2: I . ORN L-TM-4189 EVALUATION OF HAS
Page 3: i t 4 * '. c Contract No. W-7405-en
Page 7 and 8: IC, 1 % - I I ; * * I - i t EVALUAT
Page 9 and 10: i i P G - . r 3 The experiment was
Page 11 and 12: c c I hild 700OC 6-in. CLAMSHELL HE
Page 13 and 14: f 7 Fig. 6. Failed region of Hastel
Page 15 and 16: 'L, . *. . . Fig. 8. Failed region
Page 17: * ' hd Fig. 10. Micrograph of modif
Page 21 and 22: L, 15 Fig. 15. Inside surface of mo
Page 23 and 24: 8 R 17 Fig. 18. Inside surface of s
Page 25 and 26: . - 19 Air Oxidation Figure 22 show
Page 27 and 28: i 4 21 Fig. 24. Outside surface of
Page 29 and 30: U c t 1. W 23 Fig. 28. Outside surf
Page 31 and 32: i ! i 25 Fig. 31. Outside surface,
Page 33 and 34: i ' L tj t i 27 Y-111351 Fig. 33. W
Page 35 and 36: LJ L f 29 corrosion-product concent
Page 37 and 38: L, 4 Table 5. Analyses of fluoride
Page 39 and 40: a 1 33 Fig. 39. Microstructure of t
Page 41 and 42: W c f I' . 4 , 44 35 Table 7. Thic
Page 43 and 44: u c i w J. M. Dale (3) Central Rese

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