There is a great deal of industry discussion concerning the appropriateness of the use of
the “100 mV Polarization” cathodic protection criterion in facilities where multiple
metallic compositions (mixed metals) are installed underground and are
mechanically/electrically bonded. The purpose of this paper is to present technical
support for the use of this criterion, in this application, and to recommend field practices
to compensate for its’ inherent weakness and improve confidence in its’ use.