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3 years ago

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A corroded metal gusset plate was found on a bridge. It was estimated that the original area of the plate was 750 cm2 and that a

pproximately 2.5 kg had corroded away during use. Assuming a corrosion penetration rate of 0.5 mm/year for this metal, estimate the time since construction of the bridge. The density of the alloy is 10 g/cm3 .

1 answer:

fomenos3 years ago

6 0

Answer:

estimate the time since construction of the bridge is 6.66 year

Explanation:

given data

area of the plate = 750 cm²

corroded away during use = 2.5 kg

corrosion penetration rate = 0.5 mm/year

density of the alloy = 10 g/cm³

solution

we know here area is express as

CPR = $\frac{kw}{\rho A t}$ ................1

put here value ans we get t

t = $\frac{87.6\times 2.5 \times 10^6}{10\times 750 \times 0.5}$

t = 58400 hour

time = 6.66 year

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