Question 2: A cathodic protection system is to be designed for a section of coated steel buried pipe. Assume that the current required to shift the pipeline potential to the protection potential is determined by a current requirement test and found to be 500mA. Zinc electrodes with length 150cm and diameter 15 cm are available. The density of zinc is 7.14g/cm3. Assume the efficiency of zine is 90% and the soil resistivity is 1000-cm. The theoretical capacity (total charge in coulomb produced by the corrosion of a unit mass of the anode material) of zine electrodes is 810A.hr/kg. Take Epolar=0.1V, Ezn =1.1V vs. Cu/CuSO4 and E (buried pipeline) =0.85V. In order to design this CP system, determine, 10 Points| (a) Maximum current output from the zine anode (mA). (b) Total number of anodes. (c) Total mass of anodes (kg). (d) Total charge available (A.hr). (c) Replacement period (Years)