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In cathodic protection against corrosion, the metal that is deliberately attached to corrode in place of the protected metal is called the:
ASacrificial metal acting as anode
BNoble metal acting as cathode
CFlux added to the surface
DGalvanized zinc cathode
Answer & Solution
Correct answer: A. Sacrificial metal acting as anode
1. In cathodic protection the structure to be saved is made the cathode.
2. A more easily corrodible metal is connected to it.
3. This easily corrodible metal corrodes first, acting as the anode.
4. It is therefore called the sacrificial metal acting as anode.
The protected structure is the cathode, not the sacrificial piece described.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 8 Periodic Classification of Elements "Methods of Preventing Corrosion", p.127_
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