AL Pipelines Practice Questions - Alabama Pipelines Contractor Examination Exam

A buried steel tank uses sacrificial anodes. How does this system protect the tank?

The anode corrodes preferentially, making the tank the cathode so it does not corrode The anode heats the tank so moisture evaporates The anode neutralizes the pH of the surrounding soil permanently The anode blocks stray current by insulating the tank

Correct Answer:

The anode corrodes preferentially, making the tank the cathode so it does not corrode

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