Why do metals rust?

1. Can rusting be slowed down?

2. Can we speed up rusting?

3. How can rust be harmful?

4. Is rust poisonous?

5. Why does rusting happen?

6. Is the effect reversible?

7. Can rusting be prevented?

7.1. What can prevent rusting?

7.1.1. How does paint stop rust??

7.1.2. How does oil layer slow rust??

7.1.3. What chemicals stop rust??

8. Is rust useful?