The use of metal nano-polymer alloy coatings provides an excellent solution to the problem of corrosion on the inner walls of industrial wastewater pipes
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For buried sewage pipes in the industrial sector, if their inner walls are not corrosion-resistant, perforations can occur after about 1 year in some cases; the average service life is around 5 years (during which time leaks frequently occur and require repairs). A metal nanopolymer coating is used to provide corrosion protection for 5,000 meters of pipes with a diameter of 820 in just one application; it has been in use for 11 years now without any pipe leaks.
What is being done now is working on large-diameter pipes, with manual patching.
There are also so-called amorphous metals, which are said to not corrode at all in principle, especially not suffering from intergranular corrosion. It’s just very expensive