Combined corrosion mitigation and hydrogen isotope extraction from molten salts

A molten salt treatment system comprising:

• a galvanic cell, the galvanic cell comprising:
• a first electrode comprising an active metal, the active metal exhibiting reactivity with at least one impurity of a molten salt;
• a second electrode configured to facilitate a reduction half-reaction;
• and
• a molten salt pathway separating the first electrode and the second electrode, the molten salt pathway comprising the molten salt, wherein the first electrode is in ionic contact with the molten salt of the molten salt pathway;
• wherein the galvanic cell is configured to drive electrochemical reactions at the first electrode and the second electrode without external electrical energy input, and the electrochemical reactions modify a chemical composition of the molten salt by reacting with one or more impurities.