Engineering Board Exam Reviewer · Engineering Materials · hard
A steel plate ( = 7.9 g/cm3) with an exposed area of 645 cm2 loses 485 g to uniform corrosion in one year (8760 h). What is the corrosion penetration rate? (CPR in mm/yr = 87.6W/( At), W in mg, A in cm2, t in h)
- 9.52 mm/yr
- 0.000952 mm/yr
- 0.0793 mm/yr
- 0.952 mm/yr
Answer
D. 0.952 mm/yr
Solution
CPR = 87.6(485,000)/[7.9(645)(8760)] = 0.952 mm/yr.
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