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Corrosion of metals
Identify the necessary conditions for the rusting of iron and steel to produce hydrated iron(III) oxide.
5
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50
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35
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90 min
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CambridgeIGCSEChemistryMetals
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Corrosion of metals outcomes5 objectives
- Identify the necessary conditions for the rusting of iron and steel to produce hydrated iron(III) oxide.
- List common methods to create barriers against rust, such as painting, greasing, and applying plastic coatings.
- Explain how barrier methods stop rusting by preventing access to oxygen or water.
- Discuss the role of zinc in galvanizing as a barrier method and its function in sacrificial protection.
- Clarify the concept of sacrificial protection using the reactivity series and the process of electron loss.
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