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I have been reading through your anodization curves and trying to understand how they work. I first had to look up the properties of each of the alloys (basics) and found that the purity of aluminum starts with 1100 being 99% Al down to 7075 being 90% Al. I think this all corresponds to your chart. The electric resistivity starts at 30 for the 1100 and ends at 52 for 7075. I need your help in understanding this but I assume looking at the properties this is a measurement of ohms. The properties read for 7075 (10 to the minus ninth ohms-m) so 1100 alloy has the least resistance and 7075 has the most?
So looking at your first set of curves I was able to determine that the alloys follow their properties of resistance.
What I need help with is understanding bulk resistance (OSF) could you give me an example using numbers as to how you determine OSF?
I think I understand the relationship between electrolyte concentration, temperature and current density. Does this mean if you start a run with an unknown alloy say at 4.5 ASF using a CC PS and you immediately notice a decrease in voltage indicating a difficult alloy can you raise the current during the run to correspond to 6 ASF or 12 ASF? Can you change the current density during a run?
After I completely understand this set of curves I’ll have more questions concerning the second and third set. Thanks again.
So looking at your first set of curves I was able to determine that the alloys follow their properties of resistance.
What I need help with is understanding bulk resistance (OSF) could you give me an example using numbers as to how you determine OSF?
I think I understand the relationship between electrolyte concentration, temperature and current density. Does this mean if you start a run with an unknown alloy say at 4.5 ASF using a CC PS and you immediately notice a decrease in voltage indicating a difficult alloy can you raise the current during the run to correspond to 6 ASF or 12 ASF? Can you change the current density during a run?
After I completely understand this set of curves I’ll have more questions concerning the second and third set. Thanks again.
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