Which of the Statements About Cathodic Protection of a Metal

question 28

Multiple Choice

Which of the statements about cathodic protection of a metal pipe against corrosion is correct?

• A)The metal pipe is protected by attaching an active metal to make the pipe the cathode in an electrochemical cell
• B)The metal pipe is protected by coating the pipe with another metal whose standard reduction potential is less negative than that of the pipe
• C)The metal pipe is protected by attaching a dry cell to reduce any metal ions which might be formed
• D)The metal pipe is protected by attaching an active metal to make the pipe the anode in an electrochemical cell
• E)The metal pipe is protected by coating the pipe with a fluoropolymer to act as a source of fluoride ion (since the latter is so hard to oxidize)

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