Electromotive Series and Reduction Potential
Factors in Bi-Metalic Corrosion
The greater the numerical difference between metals the greater the electrical potential.
In a corrosion situation with an electrolyte metals tend to disolve and try to plate metals lower on the chart.
The 1898 chart is given as a reference but does not reflect modern science.
|
| 1898 CE |
Marks' 6th |
ASM |
| +Sodium |
|
-2.71 |
| Magnesium |
Magnesium |
-2.37 |
| |
Beryllium |
|
| |
Aluminum |
-1.66 |
| |
Manganese |
-1.188 |
| Zinc |
Zinc |
-0.763 |
| |
Chromium |
-0.74 |
| |
Iron |
-0.44 |
| |
Cadmium |
-0.403 |
| |
Nickel |
-0.25 |
| |
Tin |
-0.136 |
| Lead Pb |
Lead Pb |
-0.126 |
| Tin ? |
|
|
| Iron ? |
|
|
| |
Hydrogen (0) |
zero |
| Copper |
Copper |
+0.337 |
| |
Mercury |
+0.789 |
| Silver Ag |
Silver Ag |
+0.799 |
| |
Palladium |
|
| Gold |
|
|
| Platinium |
Platinium |
+1.2 |
| |
Gold |
+1.50 |
| -Graphite |
|
|
1898 Tables and Formulas, The Colliery Engineer Co., p.69 The Electromotive Series
Marks' Mechanical Engineers Handbook, 6th Ed., 6-122, Electromotive Force Series in Metals
ASM Metals Reference Book, 2nd Ed. p.98 Reduction Potential
Copyright (c) 2001 Jock Dempsey, anvilfire.com
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