When two different metals are in contact with each other, a reaction with moisture and the two different metals, called ___, will cause one of the metals to disintegrate faster over time.

When two different metals are in contact with each other, a reaction with moisture and the two different metals, called ___, will cause one of the metals to disintegrate faster over time.

• A. Corrosion
• B. Electrolysis
• C. Oxidation
• D. Galvanic

Answer: (B)

When two different metals touch in the presence of moisture, they form a tiny electrochemical cell. The moisture acts as an electrolyte, allowing ions to move and electrons to flow from the more active metal to the less active one. The more active metal oxidizes and wears away faster, while the other metal is relatively protected. This differential metal loss in a damp, two-metal contact is called galvanic corrosion. Corrosion by itself is too broad a term, and oxidation is just part of the redox process, not the whole phenomenon. Electrolysis involves external electrical current driving chemical decomposition, which isn’t what’s happening here. The galvanic term specifically captures the two-metal interaction causing accelerated degradation.

When two different metals touch in the presence of moisture, they form a tiny electrochemical cell. The moisture acts as an electrolyte, allowing ions to move and electrons to flow from the more active metal to the less active one. The more active metal oxidizes and wears away faster, while the other metal is relatively protected. This differential metal loss in a damp, two-metal contact is called galvanic corrosion.

Corrosion by itself is too broad a term, and oxidation is just part of the redox process, not the whole phenomenon. Electrolysis involves external electrical current driving chemical decomposition, which isn’t what’s happening here. The galvanic term specifically captures the two-metal interaction causing accelerated degradation.