(a) Explain the term corrosion (b) What are the conditions necessary for corrosion of metals to occur? (c) State FIVE (5) factors that could increase the rate of corrosion. [2 marks] [2 marks] (d) With the aid of an appropriate diagram and equations, explain the rusting of iron. [5 marks] metals such as iron, from corrosion. (i) Galvanic protection (ii) Anodic protection (iii) Cathodic protection