I'm saying that the curve is right. Ignore the numbers for the moment.
Mudwhump started at zero (when he powered up his supply) the voltage rose within minutes to a higher voltage (the 13.8V) then the voltage went up slowly (to 15.9V) in 30 minutes. At this point it peaked (because it then started to go down) he waited some minutes more to be sure that it was really going down, and then stopped.
This is what I mean by the right curve. The numbers look close to a 6A/sq.ft. current density, not 4.5A/sq.ft, which is why I'm questioning temperature and connection resistance. You're right about the elasped time being too short; to me this means that this coating could have been thicker, assuming that the 4.5A/sq.ft. is right. Mudwhump's calculations are right, but a 25% error in the current measurement (4.5A vs. 6A) sounds like too much to be likely.
Recall that some extra resistance in the connections can make the voltage measurements, hence the resistance calculations, look higher than they really are. I think you experienced this yourself, although neither of us is sure why.
Mudwhump, I hope you don't mind us using your anodization as an example. Sorry we highjacked your thread.
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