Which outcome accelerates corrosion rate when dissimilar metals contact in humid environment?

💡 Explanation

When dissimilar metals contact, galvanic corrosion occurs because the difference in electrochemical potential drives electron transfer from the more active metal to the less active metal increasing the oxidation rate of one relative to the other. Therefore, galvanic coupling, not other effects such as passivation stress relief, or oxygen exclusion, accelerates the corrosion rate.

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