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Learning objective

Explain how barrier methods work to prevent rusting by keeping oxygen and water away from iron.

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  • Practise with linked questions.
Cambridge IGCSE Combined ScienceMetalsCore content

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Quick explanation

Explain how barrier methods work to prevent rusting by keeping oxygen and water away from iron

  • This point belongs to Corrosion of metals, especially Corrosion of metals outcomes.
  • You need to be able to explain how barrier methods work to prevent rusting by keeping oxygen and water away from iron.
  • The key ideas to know are Describe.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Describe

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This objective helps connect Corrosion of metals outcomes to exam-style questions, flashcards, and revision notes for Corrosion of metals.

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Paper 3 structured question: Corrosion of metals

Paper 3Theory (Core)2 marks

Description

Barrier Methods for Rust Prevention

Barrier methods are used to protect iron from rusting by preventing contact with moisture and oxygen.

  1. a

    Explain how barrier methods work to prevent rusting.

    Aim for approximately 2 distinct marking points.

    [2]
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Cambridge IGCSECombined Science resources