Transformation of Ferrous Hydroxide Into Magnetite
Under anaerobic conditions, the ferrous hydroxide (Fe(OH)2 ) can be oxidized by the protons of water to form magnetite and molecular hydrogen. This process is described by the Schikorr reaction:
- 3 Fe(OH)2 → Fe3O4 + H2 + 2 H2O
- ferrous hydroxide → magnetite + hydrogen + water
The well crystallized magnetite (Fe3O4) is thermodynamically more stable than the ferrous hydroxide (Fe(OH)2 ).
This process also occurs during the anaerobic corrosion of iron and steel in oxygen-free groundwater and in reducing soils below the water table.
Read more about this topic: Anaerobic Corrosion
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