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Title: Development Of A Wireless Cathodic Protection Monitor
Author: Christopher Ziolkowski
Source: American Gas Association 2004
Year Published: 2004
Abstract: The objective of this project was to develop and commercialize a system to automate the collection of cathodic protection (CP) data. This objective was successfully met. KeySpan Energy and the GTI Sustaining Membership Program (SMP) jointly funded this project. The initial device specification was tailored to the needs of the Brooklyn Union (BU) distribution territory, an area predominantly protected by galvanic cells consisting of buried sacrificial anodes connected to the pipe. The BU procedure required for a CP data reading was to take a pipe-to-soil potential reading with respect to a reference cell placed in contact with the soil. This reading is taken with the sacrificial anode connected and then disconnected. The current from the anode while connected is also taken. The initial prototypes performed these functions and provided the additional function of deriving a power supply from the anode current. The initial prototypes, deployed in 1997, showed several shortcomings. The packaging needed modification to provide greater longevity in the buried environment. The anode-derived power supply required a certain minimum corrosion activity to operate the CP monitor. The permanent burial reference cells originally used were expensive and also had longevity issues.

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