This post presents a comprehensive electromotive force series, including reactions relevant to corrosion.

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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

1. 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.
2. P. R. Roberge, “Corrosion Engineering: Principles and Practice”, Chapter 4, Table 4.1,  McGraw-Hill Professional (2008). Buy book at Amazon or Kindle Edition.
3. D. A. Jones, “Principles and Prevention of Corrosion”, Chapter 2, Table 2.1, Prentice Hall, 2 ed.(1995): p.44. Buy book at Amazon.