Sulfate-reducing bacteria (SRB) are anaerobic bacteria that can cause corrosion in cooling towers and are a major cause of corrosion in cooling towers

 Sulfate-reducing bacteria (SRB) are anaerobic bacteria that can cause corrosion in cooling towers and are a major cause of corrosion in cooling towers: 

Corrosion

SRB can cause pitting corrosion, also known as under-deposit corrosion, which can decrease the life of equipment by up to 75%. 

Metal damage

SRB can damage ferrous metals like iron, mild steel, galvanized steel, and stainless steel. 

Biofilm formation

SRB can form biofilms that attach to surfaces and multiply, leading to corrosion, contamination, and mechanical blockages. 

Legionella growth

Microbiological contamination can lead to the growth of Legionella Pneumophila, which causes Legionnaires' disease. 

Reduced heat transfer

Biofilms can reduce heat transfer, which decreases operational efficiencies. 

SRB can be found in the recesses of the cooling tower basin, where there is less recirculation and no oxygen. SRB can survive in anaerobic conditions, but some can also adjust to survive in aerobic conditions. 

To control microbes in cooling water, biocides can be used. Regular detection can help to achieve optimum use of the biocide and reduce corrosion