Prevent MIC in concrete with Watter B.V.

Microbially Induced Corrosion (MIC) is a process that causes degradation in materials such as steel and iron, but it also significantly affects concrete. This global challenge is an expensive problem that can be prevented.

How Does MIC Develop?

Microbially Induced Corrosion (MIC) occurs when microorganisms attached to a surface release gases, decomposition products, and other corrosive substances. These substances cause damage to materials like rubber, metal, plastic, and concrete. MIC primarily arises in areas frequently or continuously exposed to water.

The Relationship Between MIC and Biofilm

Biofilm is a persistent, slimy layer of cooperative microorganisms. A key feature of biofilm is that microorganisms attach themselves to a surface. They then form an extracellular matrix to better protect themselves from environmental factors, giving them the best chance of survival. Biofilm can also form on materials like concrete, especially in damp environments. The microorganisms in this biofilm secrete substances that are corrosive and damage the surface, a process known as Microbially Induced Corrosion.

MIC in Concrete

A typical example of MIC in concrete is biogenic sulphuric acid corrosion. In the presence of oxygen, sulphur bacteria (SOBs), which attach to the slimy biofilm layer on a surface, oxidise sulphur compounds. These bacteria release a substance that converts sulphides into sulphuric acid. This acid significantly lowers the pH of the concrete. The process results in a reaction between the cement (calcium carbonate and calcium hydroxide) and sulphuric acid, forming gypsum (calcium sulphate). This scenario is commonly found in sewer systems and water treatment plants. MIC damage can lead to leaks and, in some cases, blockages or contamination of water distribution pipelines. Repairing such damage incurs additional costs and can significantly shorten the lifespan of concrete structures. However, this can easily be prevented through proactive MIC prevention measures.

Preventing MIC

To combat MIC, microorganisms must be continuously eliminated to prevent them from reattaching. Traditional disinfectants can be used, but they often contain harmful chemicals. These traditional methods also pose a higher risk of producing disinfection by-products, which are chemical residues harmful to both health and the environment. Ideally, a powerful agent with the lowest possible dosage should be used, significantly reducing the risk of disinfection by-products.

Sustainable Disinfectant

Watter has developed a system that produces a powerful disinfectant on-site (in-situ). Unlike traditional disinfectants, Watter’s solution is safe for humans, animals, and the environment. Produced using only water, salt, and electricity, and used in low concentrations, the risk of residue formation is significantly reduced. In-situ production also means the disinfectant is produced on demand, eliminating the need for harmful chemical storage and transport costs. This makes our disinfectant an excellent alternative for preventing MIC.

Would you like to know more about how to combat MIC in a sustainable way?

Feel free to contact our professionals.

Contact us