(1) Select the the material and the molten salt

(2) Enter the design life, wall thickness, the operating temperature, and the spent operating life

(3) Review the prediction results

Figure 1 MSC-Compass models and predicts corrosion of stainless steels and alloys in molten salts for TES and MSR applications.

Under the prevailing operating conditions shown in Figure 1 above, the predicted corrosion rate at the spent operating hours for the type 321 stainless steel is 208.192 um/y. The corrosion depth at the spent operating hours is 657.716 um, the remaining life (time-to-perforation)  is 2.757 years, the minimum wall thickness to meet the design life of 30 years is 1.930 mm (this can be considered as the corrosion allowance at the design stage). The predicted corrosion depth is also plotted against the exposure time.  Figure 2 shows the alloys available for the evaluation and assessment of their resistance to corrosion in various molten salts in TES and MSR applications. The following steels and alloys are included in the software:

1018 CS
A213 T22
A213 T5
A213 T9
A36 CS
A516 CS
304 SS
310 SS
310S SS
316 SS
316L SS
316H SS
321 SS
347 SS
GH3535
Hastelloy C-276
Hastelloy N
Hastelloy X
Haynes 230
Haynes 556
Incoloy 800H
Inconel 600
Inconel 625
Nb–Zr

Figure 2 MSC-Compass can be used for materials selection for TES and MSR applications.

Figure 3 MSC-Compass is an effective software tool for materials evaluation in various molten salts for TES and MSR applications.

Figure 3 shows the various molten salts commercially available for thermal energy storage and molten salt reactor applications. The following molten salts are included in the software:

Solar Salt
HITEC
Hitec XL (dry)
Hitec XL (hydrated)
KNO3–NaNO2–NaNO3–KCl
LiNaKNO3
Ca(NO3)2–KNO3–NaNO3–LiNO3
K2CO3–Li2CO3
K2CO3–Na2CO3
Li2CO3–Na2CO3–K2CO3
LiCl–KCl
NaCl–KCl–ZnCl2
NaCl–KCl–MgCl2
Li2BeF4 (FLiBe)
FLiNaK

The materials and molten salts databases in the software are updated regularly with more alloys and molten salts added to the lists. If you cannot find the alloy/molten salt of your interest in the lists, do let us know through the Contact Us link and we will conduct the necessary work to add the alloy/molten salt in the database, free of charge for licensed users of MSC-Compass.

MSC-Compass also models the effect of galvanic coupling with graphite for the selected alloy. In the presence of galvanic coupling with graphite shown in Figure 4, the predicted corrosion rate at the spent operating hours for the type 321 stainless steel is increased from 208.192 um/y (Figure 1) to 380.499 um/y. The corrosion depth at the spent operating hours is increased from 657.716 um (Figure 1) to 1202.066 um, the remaining life (time-to-perforation) is reduced from 2.757 years (Figure 1) to zero, the minimum wall thickness to meet the design life of 30 years is increased from 1.930 mm (Figure 1) to 3.528 mm.

Figure 4 MSC-Compass models the effect of galvanic coupling with graphite in molten salt.

Figure 5 MSC-Compass models the effect of cover gas in the vapor space of the molten salt system.

MSC-Compass also models the effect of cover gas in the vapor space of the molten salt system. The following cover gases are included in the software:

Air,

Air-CO2 mixture

Ar gas

CO2 gas

N2 Gas

The powerful applications of MSC-Compass are truly unlimited in engineering design, materials selection, process operation, inspection and maintenance, modeling and prediction of corrosion in various molten salts for thermal energy storage and molten salt reactor applications.

Click here to contact us for licensing details and experience the power of MSC-Compass.