What role does the electrolyte play in galvanic corrosion?

• A. It acts as the metallic path
• B. It allows ion flow between the anode and cathode
• C. It prevents electron flow
• D. It raises the temperature

Answer: (B)

In galvanic corrosion, two dissimilar metals are in electrical contact and submerged in a conductive liquid. The electrolyte provides the medium for ions to move between the anode and cathode, allowing the electrochemical circuit to complete as electrons travel through the metal path. This ion flow balances charge and sustains the corrosion reaction at the anodic surface. So, the electrolyte’s role is to allow ion flow between the anode and cathode. The other options miss the key function: the metallic path is the conductor, not the electrolyte; the electrolyte does not prevent electron flow; and raising temperature is not its primary role (though temperature can affect reaction rate).