How Do I Calculate Corrosion Rate in Iron?

[Wiccan_Childe]

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.

Thankyou!

 

[Anadyne]

What are you finding the corrosion rate of? You didn't describe the problem at all.

 

[Wiccan_Childe]

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.

 

[Anadyne]

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.