Question: QUESTION 2 3 The surface composition on the inner wall of an iron cylinder is kept constant at 1 w t % . The iron

QUESTION 23
The surface composition on the inner wall of an iron cylinder is kept constant at 1wt%. The iron initially has no hydrogen at all. At 700C, the diffusivity of hydrogen is 1.86E-04cm???2s. What will the hydrogen concentration be at a depth of 1mm after an exposure of 54 seconds?
Please give the answer to two significant figures in wt% hydrogen.
QUESTION 23 The surface composition on the inner wall of an

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