Chemistry 0620 · 9 Metals
9.5 Corrosion of metals
State conditions for rusting, describe barrier methods, and explain galvanising and sacrificial protection using the reactivity series and electron loss.
- Questions
- 174
- Years
- 2010–2026
- Multiple choice
- 128
- Written answer
- 46
- Average marks
- 3.1
Where this subtopic appears
- Paper 1variants 11, 12, 1377
- Paper 2variants 21, 22, 2365
- Paper 3variants 31, 32, 3315
- Paper 4variants 41, 42, 437
- Paper 6variants 61, 62, 637
- Paper 5variants 51, 523
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | 3 | 5 | – | 8 |
| 2023 | 2 | 6 | 9 | 17 |
| 2022 | – | 4 | 3 | 7 |
| 2021 | – | 3 | 9 | 12 |
| 2020 | – | 7 | 3 | 10 |
| 2019 | 2 | 8 | 7 | 17 |
| 2018 | – | 9 | 8 | 17 |
| 2017 | 2 | 7 | 10 | 19 |
| 2016 | 2 | 7 | 4 | 13 |
| 2015 | 2 | 5 | 5 | 12 |
| 2014 | – | 4 | 3 | 7 |
| 2013 | – | 5 | 6 | 11 |
| 2012 | – | 2 | 4 | 6 |
| 2011 | – | 4 | 6 | 10 |
| 2010 | – | 4 | 4 | 8 |
