Whether chamber surfaces, covers or frames – renovations to the wastewater infrastructure are an ongoing issue. The material is the problem. In the past, mainly concrete chambers were used. They are susceptible to biogenic sulphuric acid corrosion. Hydrogen sulphide, which forms from wastewater, escapes into the sewer atmosphere and diffuses into the concrete. On walls that do not come into contact with water, sulphuric acid develops, which in turn reacts with the concrete. Scientists at Graz University of Technology* have shown that this results in corrosion rates that can completely destroy the concrete components within just a few years. In contrast, high-quality polypropylene, used to make AWASCHACHT PP, among other things, resists biogenic sulphuric acid corrosion, so that it can even be used to drain aggressive industrial wastewater.
 

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* Water Research 134; Advances in concrete materials for sewer systems affected by microbial induced concrete corrosion: a review