Question

corrosion is wastful.however sometimes it is useful also .give an ex where corrosion is helpful for us.​

Answer 1

Answer:

Yes

Explanation:

Galvanic corrosion is the principle that is used in batteries. Here, two metals carbon and zinc are intentionally mixed together in a electrolyte solution where zinc corrodes faster in order to generate electrical charge.

Answer 2

How Corrosion is useful? Explain.

Although metals like aluminium, chromium & zinc are more electropositive & therefore, they would corrode more readily than iron but the oxide initially produced forms are coating that protect the metal from further corrosion.

Therefore, we can say that sometimes corrosion is useful.