This post presents a comprehensive electromotive force series, including reactions relevant to corrosion.
Download a PDF version HERE.
Link to LaTex Code.
| Electrode Reaction | Standard Potential, E0 (V vs. SHE) |
|---|---|
| \({O_3}(g) + 2{H^ + } + 2{e^ – } \to O_{2}(g) + {H_2}O\) | 2.070 |
| \({H_{2}O_{2}} +{2H^ {+}} + 2{e^ – } \to 2{H_2}O\) | 1.776 |
| \({Au^ {3+} } + 3{e^ – } \to {Au}\) | 1.500 |
| \({Cl_{2}(g) } + 2{e^ – } \to {2 Cl^{-}}\) | 1.358 |
| \({Pt^ {2+} } + 2{e^ – } \to {Pt}\) | 1.200 |
| \({O_2} + 4{H^ + } + 4{e^ – } \to 2{H_2}O\) (pH=0) | 1.229 |
| \({Pd^ {2+} } + 2{e^ – } \to {Pd}\) | 0.987 |
| \({H_{2}O_{2}} + 2{e^ – } \to {2 OH^{-}}\) | 0.880 |
| \({Hg^ {2+} } + 2{e^ – } \to {Hg}\) | 0.854 |
| \({O_2} + 2{H_2}O + 4{e^ – } \to 4O{H^ – }\) (pH=7) (a) | 0.820 |
| \({Ag^ {+} } + {e^ – } \to {Ag}\) | 0.800 |
| \({Cu^ {+} } + {e^ – } \to {Cu}\) | 0.521 |
| \({O_2} + 2{H_2}O + 4{e^ – } \to 4O{H^ – }\) (pH=14) | 0.401 |
| \({Cu^ {2+} } + 2{e^ – } \to {Cu}\) | 0.337 |
| \({2H^ {+} } + 2{e^ – } \to {H_2}\) | 0.000 |
| \({Fe^ {3+} } + 3{e^ – } \to {Fe}\) | –0.036 |
| \({Pb^ {2+} } + 2{e^ – } \to {Pb}\) | –0.126 |
| \({Sn^ {2+} } + 2{e^ – } \to {Sn}\) | –0.136 |
| \({Ni^ {2+} } + 2{e^ – } \to {Ni}\) | –0.250 |
| \({Co^ {2+} } + 2{e^ – } \to {Co}\) | –0.277 |
| \({In^ {3+} } + 3{e^ – } \to {In}\) | –0.342 |
| \({Cd^ {2+} } + 2{e^ – } \to {Cd}\) | –0.403 |
| \(2{H_2}O + 2{e^ – } \to {H_2}(g) + 2O{H^ – }\) (pH=7) (a) | –0.413 |
| \({Fe^ {2+} } + 2{e^ – } \to {Fe}\) | –0.440 |
| \({Ga^ {3+} } + 3{e^ – } \to {Ga}\) | –0.530 |
| \({Cr^ {3+} } + 3{e^ – } \to {Cr}\) | –0.740 |
| \({Zn^ {2+} } + 2{e^ – } \to {Zn}\) | –0.763 |
| \(2{H_2}O + 2{e^ – } \to {H_2}(g) + 2O{H^ – }\) (pH=14) | –0.828 |
| \({Mn^ {2+} } + 2{e^ – } \to {Mn}\) | –1.180 | \({Ti^ {3+} } + 3{e^ – } \to {Ti}\) | –1.370 |
| \({Zr^ {4+} } + 4{e^ – } \to {Zr}\) | –1.530 | \({Ti^ {2+} } + 2{e^ – } \to {Ti}\) | –1.630 |
| \({Al^ {3+} } + 3{e^ – } \to {Al}\) | –1.660 |
| \({Mg^ {2+} } + 2{e^ – } \to {Mg}\) | –2.370 |
| \({Na^ {2+} } + 2{e^ – } \to {Na}\) | –2.710 |
| \({Ca^ {2+} } + 2{e^ – } \to {Ca}\) | –2.870 |
| \({K^ {2+} } + 2{e^ – } \to {K}\) | –2.930 |
| \({Li^ {2+} } + 2{e^ – } \to {Li}\) | –3.050 |
(a) Not a standard state; added as reference.
Updates
2019-08-23: added Titanium to the EMF Series
References
- R. W. Revie, H. H. Uhlig, “Corrosion and corrosion control: an introduction to corrosion science and engineering”, Chapter 3, (2008): p.31. Buy book at Amazon or Kindle Edition.
- P. R. Roberge, “Corrosion Engineering: Principles and Practice”, Chapter 4, Table 4.1, McGraw-Hill Professional (2008). Buy book at Amazon or Kindle Edition.
- D. A. Jones, “Principles and Prevention of Corrosion”, Chapter 2, Table 2.1, Prentice Hall, 2 ed.(1995): p.44. Buy book at Amazon.
