Cathodic Protection Tester Practice Exam

The electrode where oxidation occurs is known as what?

1. Anode

2. Cathode

3. Electrode

4. Reactor

The correct answer is: Anode

The electrode where oxidation occurs is known as the anode. In electrochemical cells, oxidation is the process where a substance loses electrons. By definition, the anode is the electrode that facilitates this process. During a cathodic protection evaluation, understanding the role of the anode is crucial, as it protects metals from corrosion by providing a sacrificial element or through impressed current techniques. In contrast, at the cathode, reduction takes place, which is the gain of electrons. This relationship between the anode and cathode is fundamental in both electrochemical cells and corrosion prevention methods. Recognizing the anode’s role in oxidation helps clarify the dynamics of cathodic protection systems, where maintaining a suitable potential at the cathode is essential to prevent steel structures from corroding. The terminology is specific, making the distinction between these electrodes important for anyone working in or studying corrosion science and cathodic protection.