2. Understanding Corrosion | |
2.3 Electromotive Series [1/2] |
In an electromotive force series (Table 2.1), the potentials of pure
metals are listed in accordance with their tendencies to corrode, the
metals with the most positive potentials on the top (like Ag, Au,
Pt, etc.) followed by metals with negative potentials in the decreasing
order (Na, Mg, K, etc.). The potentials listed in the table given below
are called "Standard Reduction Potentials" as the half cell
reaction are written in the reduction form (Au3+ + 3e-
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Table 2.1: Standard Oxidation-Reduction Potentials, Volts (25oC, against Normal Hydrogen Electrode)
The method of measurement is shown below. |