THE PROBLEM OF ACIDIC CORROSION IN CONCRETE PIPES

In spite of the problem having been recognised more than 40 years ago, acidic corrosion in concrete pipes due to septicity in sewage systems continues to cause structural failures in many parts of the world. The significant acidic corrosion of concrete in these conditions does not only occur with high ambient temperatures, but also arises in more temperate conditions. This corrosive action causes degradation of concrete and other cementitious based pipes, frequently leading to total structural collapse, with records indicating failures in as little as 5 or 6 years from installation.

Concrete pipe with corrosion

Acidic corrosion of concrete pipe

The use of a correctly specified and manufactured FRP (fibre reinforced polyester) composite pipe eliminates this problem and there are many cases of these composite pipes still functioning in acidic corrosive sewage applications for more than 30 years without degradation.

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