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Galvanic series

From Wikipedia, the free encyclopedia

The galvanic series (or electropotential series) determines the nobility of metals and semi-metals. When two metals are submerged in an electrolyte, while also electrically connected by some external conductor, the less noble (base) will experience galvanic corrosion. The rate of corrosion is determined by the electrolyte, the difference in nobility, and the relative areas of the anode and cathode exposed to the electrolyte. The difference can be measured as a difference in voltage potential: the less noble metal is the one with a lower (that is, more negative) electrode potential than the nobler one, and will function as the anode (electron or anion attractor) within the electrolyte device functioning as described above (a galvanic cell). Galvanic reaction is the principle upon which batteries are based.

See the table of standard electrode potentials for more details.

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Transcription

Galvanic series (most noble at top)

The following is the galvanic series for stagnant (that is, low oxygen content) seawater. The order may change in different environments.[1]

Visual Representation

See also

References

  1. ^ "MIL-STD-889C - Department of Defense, Standard Practice, Dissimilar Metals". Roof Online. Retrieved 2018-02-28.

External links


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This page was last edited on 17 April 2024, at 14:34
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