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Materion Technical Materials Alloy Performance Guide and Capabilities

This table lists the potential differences for various metals in water at 77F 25C. The order of the series can change for different electrolytes for example different pH ions in solution. Note Stainless steel alloys have not been included in the above table.They can significantly change their potential and become much more active if exposed to stagnant or poorly aerated water. 11 GALVANIC CORROSION Anodic end The corrosion occurs here. ELEMENT STANDARD ELECTRODE POTENTIAL VOLTS Lithium -3.045 Potassium -2.920 Sodium -2.712 Magnesium -2.340 Beryllium -1.700 Aluminum -1.670 Manganese -1.050 Zinc -0.762 Chromium -0.744 Iron Mild Steel -0440 Cadmium -0.402 Yellow Brass -0.350 50-50Tin-Lead Solder -0.325 Cobalt -0.277 Nickel -0.250 Tin -0.136 Lead -0.126 Hydrogen Reference Electrode 0.000 Titanium 0.055 Copper 0.340 Mercury 0.789 Silver 0.799 Carbon 0.810 Platinum 1.200 Gold 1.420 Graphite 2.250 Cathodic end passive The corrosion does not occur here.