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Which of the following is/are the typical sacrificial anodes?

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Which of the following is/are the typical sacrificial anodes?

(a) Magnesium only

(b) Zinc and magnesium

(c) Aluminum-tin only

(d) Magnesium, Zinc, and aluminum-tin

I got this question by my college professor while I was bunking the class.

This interesting question is from Cathodic and Anodic Protection in section Corrosion Prevention of Corrosion Engineering

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Correct option is (d) Magnesium, Zinc, and aluminum-tin

Easy explanation: Sacrificial anodes are metals that have a very high negative potential, which provides high current output. Magnesium, zinc, and aluminum-tin are typical examples of sacrificial anodes.

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