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.
97 exam-style questions on Edexcel GCSE Chemistry 6.1 Transition metals, alloys and corrosion, covering 6.1.1 Properties of transition metals, 6.1.2 Corrosion and its prevention, and 6.1.3 Alloys and the uses of metals. Each one has a worked solution and a mark scheme showing where the marks go.