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Bảo vệ catốt

Metal parts submerged in seawater, such as a ship’s hull, are exposed to electrolytic conditions that lead to corrosion. If a more-reactive metal is attached to the ship’s hull, this new metal acts as a cathode and is now being protected; the sacrificial anode corrodes instead of the hull. Indium metal enhances the activation of aluminum alloy sacrificial anodes. This anti-corrosion application is not only used for ships, but also any submerged (underwater or underground) steel structure that is prone to corrosion.

Manufacturing sacrificial anodes can use indium metal at different purity grades, depending on the precise properties of the aluminum, or aluminum-zinc alloys used in the industry.