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← ScienceWhich outcome results when a magnesium anode sacrificial element is electrically isolated from a steel pipeline?
A)Oxidation risk becomes evenly distributed
B)Elevated cathodic protection accelerates corrosion
C)Galvanic corrosion protection is nullified✓
D)Formation of iron oxide layer ceases
💡 Explanation
The galvanic corrosion protection is nullified because electron transfer during *electrochemical oxidation* relies on electrical continuity between the magnesium and steel; therefore, the anode ceases to protect the pipeline, rather than modulating protection or ceasing oxidation.
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