Final answer:
Dissimilar metal corrosion is most likely to occur when two dissimilar metals are in contact with each other. The corrosion is accelerated when the more corrosion-resistant metal acts as the cathode and provides a large surface area for the reduction of oxygen. This can result in a dramatic increase in the rate of corrosion for the less corrosion-resistant metal.
Step-by-step explanation:
Corrosion is a galvanic process by which metals deteriorate through oxidation-usually but not always to their oxides. Dissimilar metal corrosion is most likely to occur when two dissimilar metals are in contact with each other. The corrosion is accelerated when the more corrosion-resistant metal acts as the cathode and provides a large surface area for the reduction of oxygen. This can result in a dramatic increase in the rate of corrosion for the less corrosion-resistant metal. For example, on an aircraft, dissimilar metal corrosion may occur where aluminum and steel are in contact.
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