What causes copper pitting corrosion to start?
There are many ideas on this subject. The list includes factors arising from improper installation, bacteria, electrical grounding, pipe manufacture, water quality, or a combination of these and other factors. While some individuals may strongly believe that one or more of these factors is involved, to date scientists have been unable to identify a cause. In fact, over the years, most of the promising ideas have been directly tested in my university laboratory, and none have ever caused a pit to form. Obviously, there is a cause, because pitting does occur-the problem is that the very unusual circumstances that cause this have not yet been scientifically identified.
