WOLFRAM|DEMONSTRATIONS PROJECT

Tafel Curve in Electrochemistry

​
log
10
(k
0
) (m/s)
-3
α
0.5
E
corr
(V)
0
-0.4
-0.2
0.2
0.4
E /V
-100
-50
50
100
i /A
-0.4
-0.2
0.0
0.2
0.4
10
-4
0.01
1
100
10
4
E /V
i /A

The Tafel curve is widely used in electrochemistry, especially in the study of corrosion. Using the Tafel curve one can determine the corrosion potential
E
corr
or open circuit potential. The coefficient of charge transfer
α
can also be determined as the slope of the Tafel curve. This Demonstration shows the current-potential curve on the left and the Tafel curve,
log
10
(current)
vs
potential
on the right.