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Corrosion Rate Question

  • 28-04-2009 09:50PM
    #1
    yoppo
    Registered Users, Registered Users 2 Posts: 206 ✭✭


    Hi,

    Im studying for my final exams at the moment and this question is a certainty on the paper. Any help would be appreciated.

    I think you have to use the Butler volmer equation but not sure how.

    A metal is corroding in an oxygen free acid of pH = 1 at 298 K according to
    the overall reaction M + 2H+ → M2+ + H2. From the data given below,
    calculate the corrosion rate of the metal in A cm-2.
    Data: the equilibrium potential E0 M2+/M = –0.76V and the solution contains
    10–2 mol dm-3 M2+. The equilibrium exchange current density, i0 for the metal
    is 10–3 A cm-2 and the transfer
    coefficient α is 0.5. For the hydrogen evolution reaction, i0 = 10–8 A cm-2 and
    E0 H+/H2 = 0.0V and α is 0.5.


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