Thanks for the feedback.
The second calculator is for calculating the surface area of the parts, hanging wire, racks, ect. In order to perform this calculation, you have to take the known values from a previous run.
This may seem redundant to do after the run is complete, but if you plan to run several batches of the same parts, you will be able to fine tune your surface area measurement of the anode (parts being anodized plus hanging wire or rack).
I think it works. I have tried it several times on the same parts using different current densities to arrive at very similar results.
For the past few months, I have been keeping very detailed logs of each anodizing run I complete. I have noticed that my peak voltages are more predictable since I have been using this formula.
Test it out. I would like to know how it works under different acid concentrations, and different series of Aluminum.
Formula for surface area:
Vmax = Peak Voltage
Ift² = Current Density
Asys = System Current
Sin² = Surface Area
Sin²=(144/Vmax 0.4)Asys
or
Sin²=(144/Ift²)Asys
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