What substance is known to deteriorate pipes?

Hydrogen sulfide is known for its ability to deteriorate pipes because it is a highly corrosive substance that can react with metals, particularly when moisture is present. This gas, often found in sewage and industrial settings, can lead to significant corrosion of materials such as steel and cast iron, which are commonly used in piping systems. Over time, exposure to hydrogen sulfide can create pitting, and eventually result in leaks or complete failure of the pipes.

In contrast, while chlorine can in some scenarios contribute to corrosion, especially in high concentrations or in certain environments, it does not exhibit the same level of aggressive deterioration as hydrogen sulfide specifically. Oxygen, though it can contribute to corrosion processes such as rusting in iron pipes, does not actively deteriorate pipes in the manner that hydrogen sulfide does. Nitrogen, on the other hand, is generally inert and does not cause corrosion. Thus, hydrogen sulfide stands out as the primary substance recognized for its detrimental effects on piping materials.