Microbial corrosion

Microbial corrosion, also known as microbiologically influenced corrosion or MIC, happens when tiny living things called microbes eat away at metal. Micron-sized bacteria grow on the metal surfaces and form colonies, which create a sticky substance called a biofilm. This biofilm protects the microbes from the elements and allows them to reproduce safely.

The bacteria colonize metal by secreting a slimy film that sticks to the surface. They then consume electrons from the metal, which creates a chemical reaction that leads to the production of acid. The acid created by the microbes slowly dissolves the metal, causing holes and pits to form. Over time, the metal can weaken, leading to costly repairs.

The microbes that cause MIC can live in any environment, including soil, water, and sewage systems. They can grow on any type of metal but are particularly harmful to pipes and structures made of iron and steel. MIC can occur in any setting where metal comes into contact with water, which creates an ideal environment for microbial growth.

To prevent microbial corrosion, it is essential to stop the growth of bacteria that live on metal surfaces. This involves careful monitoring of water systems and pipes, as well as the regular use of biocides to kill bacteria before they can form biofilms. Proper cleaning and maintenance of metal surfaces can help prevent the buildup of biofilms, while protective coatings can provide an additional layer of protection against corrosion.