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A sheet of steel 1.5 mm thick has nitrogen (N2) atmospheres on both sides and is permitted to achieve a steady-state diffusion condition at 1200ºC. The diffusion coefficient for nitrogen in steel at this temperature is D = 6 x 10-11 m2/s and the diffusion flux is found to be J = 1.2 x 10-7 kg/m2s. Also, the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3. How far into the sheet from this high-pressure side will the concentration be 1.8 kg/m3?

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Category:- Chemistry
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