How does zinc coating prevent rusting?

Related questions

1. Why is f2 the strongest oxidizing agent?
2. Why is HCl called a non oxidizing acid?
3. What is standard oxidation potential?
4. How long does zinc coating last?
5. What reacts to zinc?
6. Why is zinc used for corrosion protection?
7. Is zinc or galvanized better?
8. Does Zinc rust in salt water?
9. Is zinc magnetic?
10. Does water dissolve zinc?

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5. #cathodic
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14. #corrosion
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18. #which
19. #coating
20. #steel