Corrosion mechanism of sulfur-oxidizing bacteria (SOB)

2025-12-02View Original

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A key feature of SOB is that it obtains energy from the oxidation of reduced sulfur compounds such as sulfides, elemental sulfur, thiosulfates, and sulfites into sulfuric acid. It is generally believed that SOB accelerates material corrosion through an acid-corrosion mechanism; the sulfuric acid produced by its metabolism can lower the pH, hindering the deposition of certain protective corrosion products and thereby promoting corrosion. Currently, research on the corrosion of SOB focuses mainly on the accelerated low-water-level corrosion of metallic materials and the accelerated corrosion of concrete. When SOB and SRB coexist, the SO4 2- produced by SOB can be utilized by SRB, while the S 2- produced by SRB can be utilized by SOB, thus enabling a sulfur cycle that can lead to more severe corrosion.

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Corrosion mechanism of sulfur-oxidizing bacteria (SOB)

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