Underground steel gas pipelines are often protected from corrosion by connecting them to buried blocks of magnesium.
Explain how the magnesium blocks prevent the steel (iron) pipeline from rusting.
Practise Edexcel GCSE Chemistry Transition metals, alloys and corrosion with exam-style questions for Foundation and Higher tier. 97 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
