Foundation Level (Fail → Pass)

1. Define corrosion.

2. What two conditions are necessary for rusting?

3. State the chemical formula of rust.

4. What is galvanizing?

5. Name one metal used for sacrificial protection.

6. What happens to the sacrificial metal during corrosion protection?

7. Explain how painting prevents rusting.

8. Why does saltwater accelerate rusting?

9. What is an alloy?

10. Give one example of a corrosion-resistant alloy.

Intermediate Level (Pass → Credit)

1. Explain why corrosion is an electrochemical process.

2. Write the oxidation half-reaction for iron during rusting.

3. Write the reduction half-reaction during rust formation.

4. Compare barrier protection and sacrificial protection.

5. Explain why magnesium is used to protect steel.

6. Describe how galvanizing protects iron even if scratched.

7. Explain the role of oxygen in rusting.

8. Discuss how impurities affect corrosion.

9. Describe why stainless steel resists corrosion.

10. Explain the role of moisture in the corrosion process.

Advanced Level (Credit → Distinction)

1. Analyse the corrosion process in terms of anodic and cathodic regions.

2. Evaluate the environmental factors that increase corrosion rate.

3. Discuss galvanic corrosion using the electrochemical series.

4. Propose a corrosion prevention plan for structures near the ocean.

5. Explain passivation and how it protects metals like aluminium.

6. Compare sacrificial anode and impressed current cathodic protection.

7. Examine how pH affects corrosion rates.

8. Predict which metals can protect iron using electrode potentials.

9. Analyse how design flaws (crevices, joints) increase corrosion.

10. Evaluate the economic impact of corrosion on industry.