Chemical and Corrosion Resistance
EnviroProcessTanks® and EnviroManholes® are highly resistant to aggressive chemical environments. Further they are externally resistant to aggressive soil (PH value 1.0 - 5.0).
In order to achieve chemical resistance, some concrete pipe producers supplement an additional layer of polyethylene to the inside of the pipe. That way the concrete pipe will be internally resistant to chemicals in the medium to be transported, but not to aggressive soil from the outside.
EnviroProcessTanks® and EnviroManholes® are resistant externally and internally to aggressive chemicals. Polyolefins have a non-polar structure because they contain no double bonds. They also have a high molecular weight and therefore excellent resistance to chemicals and other media of widely varying type and composition. EnviroProcessTanks® and EnviroManholes® are resistant to aqueous solutions of salts, dilute acids and alkalis. Electrochemical processes, which can lead to corrosion in metals, do not take place with Enviropipes Pipes. Only strong oxidizing agents, such as highly concentrated peroxides and acids, or halogens attack EnviroProcessTanks® and EnviroManholes® over a prolonged period of time.
Concrete and steel pipes are very vulnerable to the aforementioned corrosive agents resulting in significant damages and failures of the system, where as Enviropipes Profiled Pipes are resistant from the inside and the outside.
Commonly most natural materials and other plastics are degraded by weathering effects, particularly by the combined impact of short-wave ultraviolet radiation in sunlight and atmospheric oxygen.
Black polyethylene pipes are permanently resistant to atmospheric corrosion and UV radiation. Thus the pipes can be used and stored outside without the pipe material being damaged.
Resistance to Micro-Organisms
Polyethylene and polypropylene are not nutrient media for bacteria, fungi and spores, so that the material is resistant to all forms of microbial attack as well as both sulphurous acid and sulphates.