Greetings.
If you take a look at the picture, in the efficiency section we can see the efficiency calculated where this was done by the author using the equation as follow:
n(%) = (Rct - R'ct)/Rct
where Rct and R'ct are the charge transfer resistances in the absence and presence of the inhibitor, respectively.
My question is although may sound quite foolish, I cannot get the same result after the calculation.
Let say we take the first 100 ppm.
(13.79-23.04)/13.79 = 0.67 or 67% (if I times by 100)
where is my mistake?
Hi, normally the corrosion current or mass los is used to calculate inhibition index in that way. Just take 1/Rct and do the same (since icorr is inversely proportional to Rct).
Best regards,
Andreas
Dear Dr. Andreas Heyn
I am sorry Sir, but I don't understand. How is it do I calculate and get the same result as in the Table? Can you please demonstrate it. Thank you !!
seems that these values are not correct ;-), or the authors used a different way to calculate them. Just ask the authors.
Dear Dr. Hassane Lgaz , Thank you very much sir. Really appreciate it :)
I think that, may be, the author calculate the IE% with Rct values estimated from impedance spectroscopy, and this values are calculated from the stern equation Icorr=1/Rct *(Ba.Bc/(Ba+Bc). But , Generally, this values of IE% are not correct.
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