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must be compatible with the surfaces of its contacts. The tendency
for a metal to enter into solution (corrode) is a function of its
electrode potential which is an inherent property of each element.
If dissimilar metals are externally connected, galvanic action occurs
in which the metal with the higher electrode potential exerts a
voltage which causes the lower (less noble) metal to corrode. The
farther apart the metals are in the table, the greater the potential
difference with a resulting greater rate of corrosion.
GALVANIC SERIES OF THE COMMON METALS, ALLOYS,
AND CARBON (CHART)
CORROSION RESISTANCE OF METAL GASKET METALS
(CHART)
(click image to enlarge)
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