rust

Question 1

What is the chemical name of rust?

Answer 1

Iron (III) oxide

Question 2

What are the three methods of rust prevention?

Answer 2

galvanizing (putting a layer of zinc on top)
sacrificial protection (putting blocks of zinc on the iron)
barrier methods (greasing, painting, oiling, or putting plastic barrier)

Question 3

How does galvanizing still work after the zinc coating is damaged?

Answer 3

Zinc is more reactive than iron, so the water and oxygen react with the zinc first.

Question 4

What is needed for rusting to happen?

Answer 4

Water, oxygen