Mostly, 1 mV/s scan rate is used for the potentiodynamic polarization test of the Aluminium alloys in literature. However, according to ASTM, the standard scan rate is 0.1667 mV/s. Does 1 mV/s give good result as compared to the lower one?
Akeel M. Kadim
In some cases, I have seen people using high scan rates like 2 mV/s, etc. in potentiodynamic polarization and they go about determining corrosion rates using Tafel extrapolation which, in my opinion is questionable.
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Marukurthi V N V Satyanarayana
Generally we can consider any scan rate upto 1 mV/s. Lowering scan rate is a time consuming process. But system will give you exact results upto 1 mV/s..beyond that we get the tafel curve but the results are not exact.. So to save the time people use 1 mV/s
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