Galvanic Series or Galvanic Table of Metals in Seawater
The Galvanic Series of Metals can be used to determine the likelihood of a galvanic reaction, and galvanic corrosion or bimetallic corrosion, between two different metals in a seawater environment.
The most Noble, metal lower in the Galvanic Series, will be the cathode while the less noble, higher in the Galvanic Series, will act as an anode and it will corrode.
The seawater galvanic series is used also to approximate the probable galvanic effects in other environments for which there are no data.
However galvanic corrosion is a function of several different factors that needs to be carefully evaluated when assessing the likelihood to have galvanic corrosion.
The table below reports the Corrosion potentials or Galvanic Series of metals in flowing sea water at ambient temperature.
The unshaded symbols show ranges exhibited by stainless steels in acidic water such as may exist in crevices or in stagnant or low velocity or poorly aerated water where Stainless Steel become active, while the shaded areas show the potentials of Stainless Steel when is in passive state.
This table is taken from: Atlas Steel Technical Note No. 7 "Galvanic Corrosion".
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