Corrosion of Metals
Chemistry ⇒ Metals and Non-metals
Corrosion of Metals starts at 8 and continues till grade 12.
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See sample questions for grade 8
A steel bridge is exposed to rain and air. Suggest two ways to protect it from corrosion.
Describe one way in which corrosion can be prevented in ships.
Describe the process of rusting in iron.
Explain how oiling or greasing prevents corrosion of metals.
Explain the term 'galvanization'.
Explain why aluminium does not corrode as quickly as iron, even though it reacts with oxygen.
Explain why copper develops a green coating over time.
Explain why iron corrodes faster in salty water than in pure water.
Explain why iron objects kept in dry air do not rust easily.
Name one metal that is commonly used as a sacrificial anode to protect iron from corrosion.
What is corrosion?
What is the main cause of corrosion in iron?
What is the role of moisture in the corrosion of iron?
A metal object is buried underground where the soil is moist and contains salts. Predict and explain what will happen to the object over time.
A water tank made of iron is leaking slightly, causing water to be in constant contact with the metal. Suggest and explain a method to reduce the rate of corrosion in this situation.
Describe how the process of alloying can help prevent corrosion of metals.
Explain why stainless steel is less likely to corrode than pure iron, even though it contains iron as one of its main components.
Explain why the rate of corrosion increases with temperature.
