This inexpensive method of corrosion monitoring can provide valuable insight as to system integrity. Side-stream filtration is often employed to maintain system cleanliness especially with previously fouled systems. The unit should be sized to filter the entire volume of the system 3-5 times per day. The filter media should be appropriately sized to match the foulant. Sized too small in the beginning, filters will plug often, causing not only a maintenance problem, but increased costs due to filter replacement.
Any closed system has the potential to become contaminated with microbes.
These microbes can be introduced to the system in many ways. Whatever the cause, microbiological corrosion in a closed system can become a serious problem in a very short time and should be addressed immediately. Various microbes will produce acidic by-products that will suppress pH and increase corrosion. Others can produce ammonia that will increase pH and cause corrosion. If a closed system becomes contaminated with microbes, the system should be sanitized with a biocide.