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Deciding which cable insulation to use for impressed current anodes depends on installation parameters.  A single layer of HMWPE insulation is a good choice for anodes but is not chemically resistant. Therefore, the insulation can deteriorate when exposed to certain chemicals, such as chlorine gas, causing premature cable failure.   Adding a primary layer of Halar provides a very chemically resistant protective layer to the copper cable. It is the best choice when significant chlorine gas is produced in the anode well and in contact with anode cable.

Most Cathodic Protection (CP) technicians understand the purpose and operating features of CP rectifiers. However, when the CP system goes down, troubleshooting a CP rectifier may require some help.

The following provides a basic understanding of the function of the CP rectifier and some basic troubleshooting tests that can identify many of the common rectifier problems.

The following are considerations when selecting the type of cathodic protection (CP) system for a newly installed, existing buried or submerged structure.

Surface Area of Exposed Metal
The size and cost of most CP systems are controlled by how much CP current is required to effectively protect the exposed metal in contact with the electrolyte (soil or water). Therefore, one of the first considerations when designing or selecting a CP system is the surface area of metal exposed to the electrolyte.