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Homework Help: Corrosion Rate

  1. Oct 23, 2007 #1
    Hi, I have a problem, and I'm not looking for anyone to give me the answers, just a pointer in the right direction would be fantastic.

    eg. Iron
    Material Density (g/cm^3) = 7.87
    Oxidation State (Z) = 2
    Corrosion Current Density (amps/cm^2) = 2.5*10^4
    Atomic Weight (g/m) = 55.8
    Corrosion Rate = ??

    We're given a list of equations, as follows -
    Rate= j/nF
    density = m/v
    o= Ee
    F = 96,500 Coul/mol
    o= F/Ao
    1 MPa = 10^6 N/m^2

    I have no idea which equations to use even, I'm very new to physics, and would appreciate anyone who can help me out, because I want to be able to solve (and understand!!) how to figure it out.

  2. jcsd
  3. Oct 23, 2007 #2
    What are you finding the corrosion rate of? You didn't describe the problem at all.
  4. Oct 23, 2007 #3
    All we're given is the info below in a table, and this paragraph before it...

    Deterioration or corrosion of a prosthetic device is an important factor for the selection of a material. For a metal to retain its mechanical properties over the lifetime of the implant the corrosion rate must be less than 2.50 x 10-4 mm/yr. In the following table calculate the corrosion rate in mm/yr for each of the materials.
  5. Oct 23, 2007 #4
    This looks like a tedious conversion problem chemistry problem more than a physics problem. I really don't think this is one of the introductory physics topics.
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