Combined corrosion mitigation and hydrogen isotope extraction from molten salts

A method for treating a molten salt, the method comprising:

• flowing a molten salt along a pathway, the pathway comprising a galvanic cell including a first electrode and a second electrode wherein the pathway separates the first electrode from the second electrode, the first electrode comprising an active metal, the active metal comprising an alkali metal or an alkaline earth metal, the second electrode comprising a catalyst or electrocatalyst for hydrogen generation;
• closing a galvanic circuit, and thereby encouraging chemical and/or electrochemical reactions in the molten salt, a reactant of the chemical and/or electrochemical reactions comprising a corrosive impurity of the molten salt, reaction products of the electrochemical and/or chemical reactions including hydrogen gas, wherein the galvanic cell operates without application of an external electrical energy input to drive chemical and/or electrochemical reactions at the first electrode and the second electrode;
• and
• separating the hydrogen gas from the molten salt.