CH-652
Rusting
Chemistry · Secondary 3 · Medium · Rusting
A steel water tank is buried underground. To reduce rusting, strips of magnesium metal are attached to the tank. Magnesium is more reactive than iron.
How do the magnesium strips help to protect the steel tank?
How do the magnesium strips help to protect the steel tank?
- Magnesium forms a hard paint-like layer on the steel surface.
- Magnesium reacts first with water and oxygen instead of the iron.
- Magnesium removes all water from the soil around the tank.
- Magnesium lowers the temperature of the tank so rusting cannot occur.
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