ORNL-1816 - the Molten Salt Energy Technologies Web Site

ANP QUARTERLY PROGRESS REPORT
rrugated Fin Segment of a Heat
d with an 82% Au-18% Ni Alloy.
on the basis of short-time static tests. However,
an experiment was conducted to determine the
influence of a high gold concentration gradient on
the corrosion resistance of the internal surface
of an lnconel tube when exposed to fused fluoride
salt at 15OOOF.
The test specimen consisted of a 1 4-in.-OD,
0.035-in.-wall lnconel tube formed into a seesaw
test capsule to which were brazed several nickel
fins of the dish type. An excessive amount of
brazing alloy was used, and the brazing time was
extended to 1 hr at 19OOOF to promote dilution
and diffusion. The capsule was then filled with
fluorides and operated as a seesaw test for a
period of 500 hr at l5OO0F prior to examination.
Sincethe observed 1- to 2-mil attack of the internal
surface was considered to be normal, a microspark
7.5. lnconel T-Joint Brazed with 82% Au-18% Ni After Exposure to Static Air for 1300 hr at
15OOOF. Only minor attack can be seen. Etched with G. regia. 1OOX.
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