Chemistry 0620 · IGCSE · Corrosion of metals

Corrosion of metals — practice question

The following four methods can be used to stop iron rusting. 1 alloying 2 coating with plastic 3 greasing 4 painting. Which of these are barrier methods?

  • A1, 2 and 3
  • B1 and 4
  • C2, 3 and 4
  • D3 and 4 only

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