Effect of FeCl3 in NaCl-MgCl2 molten salts on the corrosion behavior of 316 stainless steel at 600?C
Corrosion Science(2023)
Abstract
The effect of FeCl3 addition on the corrosion of 316 stainless steel (316SS) in NaCl-MgCl2 salts at 600 degrees C was studied through a static corrosion test. FeCl3 added into NaCl-MgCl2 salt reacted with Fe in 316SS and accel-erated the corrosion of 316SS. After corrosion, Fe2+ and Fe3+ coexisted in the NaCl-MgCl2 salt, and the con-centration of Fe2+ was higher than that of Fe3+. With the increased FeCl3 concentration in NaCl-MgCl2 salt, the grain boundary corrosion of 316SS was aggravated, and the concentration difference of Fe2+ and Fe3+ in the salt increased after corrosion.
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Key words
Molten salt,NaCl-MgCl2,Iron ions,Stainless steel,Corrosion
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