Steel boat hulls are often protected from rusting by attaching blocks of zinc, known as sacrificial anodes, to the hull.
Even when the steel hull is in direct contact with salty seawater, the steel does not rust as long as it is near a zinc block.
Explain why the exposed steel (iron) does not rust.
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.
