A piece of corroded steel plate was found in a submerged ocean vessel. It was estimated that the original area of the plate was
17 in.2 and that approximately 2.1 kg had corroded away during the submersion. Assuming a corrosion penetration rate of 200 mpy for this alloy in seawater, estimate the time of submersion in years. The density of steel is 7.9 g/cm^3.
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