Hello everyone,
I am actually performing a corrosion rate analysis for a sample of aluminium that is electroplated with nickel. I am using Linear Polarisation using the Palmsens EmStat 4s potentiostat.
However, to find the yearly corrosion rate, I need to add data regarding the equivalent weight and density of the metal sample that I am testing.
For pure aluminium, the equivalent weight is 9, and density would be 2.7 g/cm3; however, what would I consider if the aluminium has an electroplated coating of nickel? Considering nickel's equivalent weight and density would be inaccurate, right?
Please let me know what values would be suitable.
Regards.
For simple can used the
Eqution C.R=0.43 Icorr.
For steel
Eqution C.R=0.44 Icorr.
For aluminium
Dont used the eq
C.R= Icorr.EW/D
IT same eq but in other descripation
If the corrosion is limited on nickel coating only, not onto aluminium substrate, then you can use equivalent weight and density of nickel. (then gram/cm^2/year or whatever would be of nickel, and cm/year would be also of nickel.
But if both nickel and aluminium are corroded, scenario would be much more complex, depending on what you are targeting to find out.
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