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Which is widely employed as a sacrificial anode in applications involving water-immersed steel structures, such as pipelines?

40. Which is widely employed as a sacrificial anode in applications involving water-immersed steel structures, such as pipelines?

1. Aluminium
2. Titanium
3. Iron
4. Zinc

Answer: D) Zinc

Explanation:

In applications requiring steel structures submerged in water, such as pipelines, zinc is typically employed as a sacrificial anode.