IGCSE Chemistry revision Notes Corrosion of metals

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Syllabus Objectives

IGCSE: Metals

Sub Topic:9.5 Corrosion of metals

Syllabus Objectives:

CORE:

  • State the conditions required for the rusting of iron and steel to form hydrated iron(III) oxide
  •  State some common barrier methods, including painting, greasing and coating with plastic
  • Describe how barrier methods prevent rusting by excluding oxygen or water

EXTENDED:

  • Describe the use of zinc in galvanising as an example of a barrier method and sacrificial protection
  • Explain sacrificial protection in terms of the reactivity series and in terms of electron loss

Revision Notes

IGCSE Chemistry revision Notes  Corrosion of metals

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