An underground steel pipeline is connected to blocks of magnesium metal buried in the surrounding damp, acidic soil. Although the steel is exposed to moisture and oxygen, it does not corrode.
Explain how the magnesium blocks protect the steel pipeline from corrosion.
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.
