In a laboratory, small iron objects can be protected from corrosion (rusting) by coating them with a thin layer of grease or oil.
Give two reasons why applying a simple grease or oil coating is not a suitable method for protecting large-scale steel structures, such as offshore wind turbine towers, from corrosion over their service life.
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.