Protecting Iron from Rusting with Zinc

What is the primary purpose of coating steel with zinc in the galvanizing method?

• To increase the weight of the steel

• To enhance the color of the steel

• To prevent oxygen and water from reaching the iron

• To make the steel more flexible

In the sacrificial protection method, why does zinc prevent the iron from rusting?

• Zinc absorbs all the moisture

• Zinc is less reactive than iron

• Zinc is more reactive than iron

• Zinc forms a magnetic field around the iron

What happens when zinc reacts with oxygen in the context of sacrificial protection?

• It forms a weak and brittle material

• It forms zinc oxide, a hard and strong material

• It releases harmful gases

• It causes the iron to rust faster

Why is zinc considered a cost-effective option for protecting iron?

• Zinc is the most readily available and cheapest option

• Zinc is more expensive than other metals

• Zinc is the least effective but widely used

• Zinc is the heaviest metal available

What happens if the zinc layer on galvanized steel gets scratched?

• The steel immediately starts to rust

• The zinc still protects the steel through sacrificial protection

• The zinc layer repairs itself

• The steel becomes more brittle