Cathodic protection involves supplying electrons to the metal to be protected from an external source. The external source maybe be an external _______ or by__________. A、dc power sourceB、Alternating Power SourceC、A Galvanic CoupleD、Cathode
Cathodic protection involves supplying electrons to the metal to be protected from an external source. The external source maybe be an external _______ or by__________.
A、dc power source
B、Alternating Power Source
C、A Galvanic Couple
D、Cathode
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