Internal Copper corrosion in both domestic and commercial environments is an exceptionally common phenomenon which can lead to expensive plumbing repairs and in situations where the water is potable, it can compromise water quality with potential health concerns. From discoloured water, to pinhole leaks, the signs of copper corrosion are often not noticed until the damage is uncovered.
For the corrosion testing and investigation who should you turn to? Here at BBB Technologies Ltd, our laboratories have been investigating corrosion for decades, providing trusted, independent & validated materials testing to
What causes internal copper pipe corrosion? In our long experience, aggressive water chemistry, high water velocity and faulty plumbing installation systems are the prime cause. A combination of these factors damages the internal oxide film which naturally forms within copper pipes, slowly wears away the pipe which eventually leads to pitting and the formation of pinhole leaks.
Water Chemistry: Low pH (below 7.0) , high dissolved oxygen increases oxidation, high total dissolved solids increases water conductivity, added chemicals to process degrade the internal oxide film and finally mereologically influenced corrosion caused by iron or sulphate reducing bacteria produce byproducts which again degrade the internal oxide film.
Water Velocity: High water flow, typically above approx. 1.5 to 2.0 m/s will mechanically erode the inner walls of a copper pipe, flow turbulence caused by unreamed pipe ends and sharp bends, can create turbulent pooling of water. Suspended sediment in water, such as grit, sand or rust slowly abrade the copper. All of these effects are exacerbated should the copper pipes be carrying hot water.
