Question

If you were to apply a substance to prevent rust on a steel shovel, which of the following would you expect to protect the iron using the same mechanism as the galvanized nail? Select all that apply. A. Vinegar B. Magnesium C. Gold D. Aluminum E. Latex paint F. Rubber

Answer 1

To answer this we have to understand forst ehat is galvanized nail mechanism:

The galvanized nails are made up of iron and then coated with zinc to prevent corrossion. The nails are dipped in a hot solution of zinc and kept untill the temperature of nail and solution will same. after that nails are removed and used for application as it forms Zn-Fe alloy it is more resistant to the corriossion.

We discuss each option one by one and decide whether it is suitable or not.

A. Vinegar: it is normally used to remove rust from corroded metal. so it cannot be used to prevent corrossion.

B. Magnesium: Magnesium cannot be used for coating as Mg itself is a corrossive and it is light in weight.

C. Gold: OMG! Can you think of gold coating on shovel. This will work but this will increase your cost. So I would say this is not a smart choice.

D. Aluminium: My suggession will be use Al coating to prevent shovel from corrossion. Spray guns are used now adays to coat material with Aluminium.

Answer is D aluminium