The Galvanic Series |
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A galvanic series table
lists metals in the order of their relative activity in a specific environment. The list begins with the more
active (anodic) metal and proceeds down the to the least active (cathodic) metal of the galvanic series. A
"galvanic series" applies to a particular electrolyte solution, so for each specific solution which is expected to
be encountered for actual use, a different order or series will ensue. In a galvanic couple, the metal higher in
the series (or the smaller) represents the anode, and will corrode preferentially in the environment. This is the
"dissimilar metals" corrosion that is spoken of.
Listed below is the latest galvanic table from MIL-STD-889 where the materials have been numbered according to how they interact in a galvanic couple in a seawater environment. The table is the galvanic series of metals in sea water from Army Missile Command Report RS-TR-67-11, "Practical Galvanic Series."
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