Concrete and carbon steel are among the most used materials in many industries, such as infrastructure, transportation and manufacturing. Surfaces of both materials, when exposed to non-sterile environments, can be the sites of biological activities of various microorganisms. Many of the activities are deleterious. From the long-term perspective, both concrete and metal can deteriorate and may ultimately lose their original functionalities. The deterioration of materials caused by microorganisms is known as microbiologically influenced (induced) corrosion (MIC)