What is a common method to reduce external pipe corrosion?

Applying bituminous coatings or polyethylene wraps is a common method for reducing external pipe corrosion because these materials act as effective barriers that prevent corrosive substances from coming into direct contact with the metal pipe surface. By isolating the pipe from environmental factors that contribute to corrosion, such as moisture, soil acids, and salts, these coatings significantly prolong the lifespan of the pipes.

Bituminous coatings provide a thick, protective layer that creates a waterproof seal, while polyethylene wraps offer dual benefits by being resistant to various chemicals and by also insulating the pipe. This protective approach is crucial in maintaining the integrity of piping systems, especially those buried underground or exposed to corrosive environments.

While other methods like regular inspection and maintenance are essential for finding and addressing existing corrosion issues, they do not inherently prevent corrosion from occurring in the first place. Additionally, increasing the water temperature can actually accelerate corrosion in some cases, rather than mitigate it. Thus, employing protective coatings remains one of the most effective proactive measures against external pipe corrosion.