1 the diagram show a proposed design for an outdoor

1. The diagram show a proposed design for an outdoor water tank. What aspects of the design might cause
concern for corrosion? (20 marks)
2. An aircraft wing composed of carbon fiber-reinforced epoxy is connected to a titanium forging on the
fuselage. Will the anode for a corrosion cell be the carbon fiber, the titanium, or the epoxy? Which will
most likely be the cathode? Explain. (10 marks)
3. The shaft for a propellor on a ship is carefully designed so that the applied stresses are well below the
endurance limit for the material. Yet after several months, the shaft cracks and fails. Offer an explanation
for why failure might have occurred under these conditions. (10 marks)

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