Iron plate was immersed into acid solution. Represent graphically the polarization curves of the system according to the following data, and then find: 1- The corrosion potential for a stagnant and a flowing solution if the limiting diffusion current density was 3 x 10 ^ A/cm² and 2.5 x 10 ^ 4 A/cm² in both conditions respectively. 2- The corrosion rate estimated in mmpy in both cases. 3- The anodic and catodic polarization measured from the equilibrium potential for each electrode Given data: B = B = 0.05 V E. (Fe/Fe*2)= -0.44 V(SHE), I. (Fe/Fe*2) = 10 A cm2 E. (H/H) = -0.OV(SHE), I. (H/H/Fe = 10 A cm? atomic weight and density of Fe is 55.85 and 7.8 g/cm respectively.
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2357
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