Bacterial anaerobic corrosion

Bacterial anaerobic corrosion typically impacts metallic substrates but may also occur in concrete.

[2] Similarly, biofilms are important for bacterial anaerobic corrosion of metals in wastewater pipes.

As the metal is oxidized under anaerobic conditions by the protons of water, H+ ions are reduced to form molecular H2.

This can be written in the following ways under acidic and neutral conditions respectively: Usually, a thin film of molecular hydrogen forms on the metal.

There is varying impact on local corrosion noted from biofilms formed of diverse microbial communities.