Cations (+) from Anode
Corrosion occurs when anions and cations
flow between an anode and a cathode,
creating an electrical circuit. Note that the
anode and cathode don’t need to have
direct contact. They often are connected
indirectly through a conducting medium,
or electrolyte. In outdoor pipe installations,
the conducting medium usually is soil; in indoor installations, it can be humid air.
Anions (-) from
sion or alkaline corrosion can occur at
the cathode, depending on the materials involved. The most common type of
alkaline corrosion damages alkaline batteries. Interestingly, alkaline water and
some alkaline conditions actually protect
steel pipe from corrosion by forming a
protective film of ferric hydroxide.
Chemical Corrosion. Chemical corrosion is caused most often when an acid
contacts a metal. This can happen in
chemical plants, paper mills, and petroleum refining facilities. A common form
of chemical attack occurs under the insu-
THE SOLUTION PREFERREDBY METAL FABRICATORS!
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