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loop in which sodium was circulated
have been completed. Samples from the
hoL, cold, and heat exchanger sections
of the loop were examined. Corrosion
was negligible, as shown in Table 11.13.
FUNDAMENTAL CORROSION RESEARCH
W. R. Grimes
Materials Chemistry Division
W. D. Manly
Metallurgy Division
The basic research needed for
determining corrosion mechanisms has
Initial weight, g
2
Initial area, in.
Initial volume,
3
in.
Initial density,
3
dcm
Approximate
weight of NaK, g
Duration of
heating, hr
Final weight, g
Weight loss
In grams
In per cent
Final volume,
3
in.
Approximate
volume loss, x
Weight loss per
initial unit
area, mg/in. 2
PERIOlD ENDING DECEMBER IO, 1.952
been continued. Examinations have
been made of corrosion products from
dynamic corrosion test by making use
of chemical and physical means to
determine identities of the products,
and studies are continuing on high-
temperature reactions of various
liquids withstructural metals, thermal
stability of NiO and NiF,, and reactions
of molten fluorides under applied
potentials. The preparation of various
complex interaction products of
structural metals with fluorides and
the characterization of these compounds
TABLE 11.12. SUMMARY OF BeO-NaK COMPATIBILITY TESTS
1(a)
0.625
0.0313
90
6.4
2
1.5054
0.625
0.0313
2.93
82
96
1.3320
0.1734
11.5
280
--
3(b)
1 I 4196
0.625
0.0312
2.80
82
129
1.1047
0.3149
22.2
500
4(c )
1.4049
0.623
0.0307
2.80
82
203
1.3653
0.0396
2.81
0.0306
leg1 igi bl e
60
RUN AND SAMPLE NO.
5
1.2287
0.609
0.0310
2.60
82
174
1.0896
0.1391
11.3
Q. 0263
15
2 30
1.2736
0.455
0. 0293(h)
2.65
a2
2 12
0.9384
0.3352
26.3
”0. 028(h )
3(h)
7 40
1. a437
0.625
Q.0378(h)
2.98
82
2 12
1.4335
0.4102
22.3
0.031(h)
19(h)
67 0
25.3124
4.60
0. 567
2.72
75
29.9273
(a)Temperature cycled from hoom temperature to
1500+OF once and BOO to 1500 F five times; one (“Surface removed irregularly, leaving
corner chipped off during test. “ditches” and rounded corners.
‘b’Sample in two pieces at end of run; no other (f’Dense outer section of Be0 block (for
pieces found.
(C’Rotat,ed 14 hr; static 189 hr.
density, see sec. 12, “Metallurgy and Ceramics”).
‘g ) I rregu 1 ar semi w edge 6 hapes .
(d)Porous inner section of Be0 block (for (h)Calculated for irregularly shaped samples;
dens~ty~ see sec. 12. “Metallurgy and Ceramics”). values uncerteln.
5.45
0.640
2.85
75
151