Stray current corrosion occurs when a metal
object becomes anodic with respect to another
structure. When the object is anodic to another
structure, the surface acts/behaves as if it is a
sacrificial anode, i.e., the surface is dissolved
while electrically protecting the other cathodic
structure. Photograph A below shows stray current
corrosion on a copper water pipe.
Photograph A Example of stray current
corrosion on a copper water pipe.
