A corrosion engineer in a company given a task to measure the corrosion rate of a huge water tank made from carbon steel (AISI 1020). This tank is storing one million cubic meter of drinking water. The measurements should be carried out in the tank itself (not in the lab). a) Explain the corrosion engineer method of measuring the corrosion rate. Draw a schematic of his method. b) Calculate the corrosion rate of water tank in mdd and mpy. c) If the wall thickness of the water tank is 15 mm, then find the time for the thickness to be reduce to 10 mm due to corrosion. Data: Each sample that he used has an area = 100 cm2 The exposure tine is 10 days The total weight loss = 200mg