Question 33

Summary: (a) Effect of marine environment on a wood and metal artefact. (b) Labelled diagram to show electrolysis of an aqueous solution of potassium chloride, including identification of the cathode. (c) Explanation of how different composition of steel determine properties and uses. (d) Investigation of environmental factors affecting rate of corrosion of iron. Method to reduce effect of a corrosive factor in the marine environment. (e) Suitability of techniques for restoring and conserving wooden and copper artefacts that have been immersed in saltwater for at least 100 years.