Multiple choice

A magnesium plate is connected to the underground mild steel pipe to prevent the corrosion of pipe. The magnesium plate acts as

  1. sacrificial anodic metal

  2. sacrificial cathodic metal

  3. corrosion inhibitor

  4. cladding metal

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Magnesium is one of the most common sacrificial anodic metals. Magnesium is more positive than iron, and hence in electrochemical cell it acts as anode and iron acts as cathode.