Question

Which of the following reference electrode is used for cathodic-protection surveys?

(a) Standard hydrogen electrode

(b) Copper/copper sulfate reference electrode

(c) Calomel electrode

(d) Either calomel or standard hydrogen electrode

I got this question in class test.

Asked question is from Cathodic and Anodic Protection in portion Corrosion Prevention of Corrosion Engineering

Answer 1

Right option is (b) Copper/copper sulfate reference electrode

The explanation is: Copper/copper sulfate reference electrode is used for cathodic protection surveys. The potential of a structure is determined with a high-resistance voltmeter. This electrode has the advantages of low cost, good accuracy, and ruggedness.