**This Powerpoint specifically uses the Cambridge iGCSE Chemistry Syllabus and covers all criteria for – Unit 9.5 Corrosion of Metals
**
Students will be able to -

1 State the conditions required for the rusting of
iron and steel to form hydrated iron(III) oxide

2 State some common barrier methods, including
painting, greasing and coating with plastic

3 Describe how barrier methods prevent rusting
by excluding oxygen or water

Supplement

4 Describe the use of zinc in galvanising as an
example of a barrier method and sacrificial
protection

5 Explain sacrificial protection in terms of the
reactivity series and in terms of electron loss

**Every Powerpoint includes learning objectives, a starter and plenary, suitable activities and review questions with mark scheme. We also provide a FREE pdf version of the file so it can easily be printed for students as a handout or uploaded to the school VLE system
**

Bring your Cambridge iGCSE Chemistry lessons to life with our expertly designed teaching resources. Each unit is tailored to the latest syllabus, offering ready-to-use lesson plans, engaging experiments, and visually clear notes that save hours of prep time. Whether you’re new to the course or refining your approach, The Science Shelf gives you everything you need to boost student understanding and exam success — all in one place.