12 (4 points) List two methods of corrosion prevention/inhibition in designs whe

Question

12 (4 points) List two methods of corrosion prevention/inhibition in designs where galvanic corrosi occur 13. (8 points) You are gi ven a sample of a composite material composed of 40 % (by volume) randomly oriented glass fibers in a polymeric epoxy matrix. The elastic modulus for the glass is 72.4 GPa and the elastic modulus for the epoxy matrix is 6.90 GPa. What is the lower bound elastic modulus (isostress condition) for this composite material? 14. (Bonus question: 10 points) The steady state creep rate for an iron alloy was experimentally measured as 6.6 x 10 h at 820°C and 8.8 x 102 h at 925°C when a constant stress of 140 MPa was applied. Determine the steady state creep rate at the design service temperature of 550°c.

Explanation / Answer

Method of prevention of corrosion when galvanic corrosion may occur are

1.cathodic protection

2.electroplating

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