Cathodic protection of a metal pipe against corrosion usually entails attaching

Question

Cathodic protection of a metal pipe against corrosion usually entails attaching an active metal to make the pipe the anode in an electrochemical cell. coating the pipe with another metal whose standard reduction potential is less negative than that of the pipe. attaching an active metal to make the pipe the cathode in an electrochemical cell. attaching a dry cell to reduce any metal ions which might be formed. coating the pipe with a fluoropolymer to act as a source of fluoride ion (since the latter is so hard to oxidize).

Explanation / Answer

cathodic protection of a metal is to be used to protect the pipe lines , in this protection the another metal is deposited to the pipe line where this metal acts as a anode . and the metal of pipeline acts as a cathode in an electrochemical cell. the anode (metal) is first get corroded and not the metal of pipeline,

so, the option C is correct. attaching an active metal to make the pipe the cathode in an electrochemicl cell.

also the option E is correct, as coating the pipes with fluoro polymer , it will not corrode the pipelines , e.g. tefoln coating of pipes (PTFE) POLY TETRAFLUORO ETHYLENE)

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