---
title: Galvanic Corrosion | one to ONE Holdings
description: "Galvanic corrosion explained: the electrochemical process, components (dissimilar metals, contact, electrolyte), and its impact on engineering."
image: https://www.o2oh.com/hubfs/o2Oh_18mm.jpg
---

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# Glossary

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# Galvanic Corrosion

Galvanic corrosion is an electrochemical phenomenon in which a metal corrodes more readily when it is in electrical contact with a dissimilar metal and both are in contact with an electrolyte (like water or saltwater).

The two metals, due to their different electrode potentials, form a simple electrochemical cell. The more active (less noble) metal acts as the [anode](https://www.o2oh.com/glossary/anode) and accelerates its own degradation, dissolving rapidly into the electrolyte.

Conversely, the less active (more noble) metal acts as the cathode, where corrosion is inhibited. This cell requires three components: dissimilar metals, an electrical contact, and an electrolyte. Understanding this mechanism is vital for resilient engineering and material selection.

### RELATED WORDS

---

- [Green Steel Standards](https://www.o2oh.com/glossary/green-steel-standards)
- [Gate-to-Gate](https://www.o2oh.com/glossary/gate-to-gate)
- [GRI](https://www.o2oh.com/glossary/gri)
- [Galvanic Reversal](https://www.o2oh.com/glossary/galvanic-reversal)
- [Global Warming Potential (GWP)](https://www.o2oh.com/glossary/global-warming-potential-gwp)
- [Galvanized Steel](https://www.o2oh.com/glossary/galvanized-steel)
- [GHG Protocol](https://www.o2oh.com/glossary/ghg-protocol)
- [GHG](https://www.o2oh.com/glossary/ghg)

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