What are sacrificial anodes also known as?

• A. Galvanic Anodes
• B. Electrolytic Anodes
• C. Corrosive Anodes
• D. Cathodic Anodes

Answer: (A)

Sacrificial anodes are commonly known as galvanic anodes. This term arises from the principle of galvanic corrosion in which these anodes are used to protect metal structures from corrosion. Sacrificial anodes are made of a less noble metal that is more reactive than the metal they are protecting. By corroding first, these anodes prevent corrosion from occurring on the more valuable metal structure, such as pipelines or boat hulls.

In contrast, electrolytic anodes, corrosive anodes, and cathodic anodes refer to different concepts or categories in corrosion prevention and may not specifically provide the same protective function as sacrificial anodes. The galvanic action is integral to the functioning of sacrificial anodes, making the correct terminology essential for understanding and applying corrosion protection methods effectively.