What Determines How Corrosive Your Soil Is?

Written by Angela

Reach out to Dreiym Engineering for any Corrosion, Electrical or Forensic Questions.

February 17, 2023

5 Types of Cathodic Protection Testing Equipment

A cathodic protection system uses electricity to prevent metal structures like pipelines from corroding. The system creates an electrochemical cell using the corrosive metal as the cathode, with a sacrificial metal acting as the anode to collect corrosion.

If you have a cathodic protection system in place, it’s a good idea to test it every two to four years. There are a few types of cathodic protection testing equipment the specialist may use; let’s look at how each of them works.

Copper Sulfate Half-Cell

This piece of equipment is also called a portable reference electrode. When the cathodic protection specialist tests your CP system, they will insert the copper sulfate half-cell partway into the soil and connect it to a voltmeter. Reference electrodes are used to define a constant potential when measuring cathodic protection.

Portable Voltmeter

A voltmeter that gives readings in small measurements, like milliamps, is an indispensable tool for testing cathodic protection. The voltmeter connects to both the anode and the cathode to test how well the CP system is protecting the cathode from corrosion.

Selectable Input Resistance Digital Multimeter

Cathodic protection analysts use a couple of different types of multimeters when testing CP systems. A multimeter with selectable input resistance allows the specialist to test the resistance of the circuit that keeps your pipes from corroding.

High Impedance Digital Multimeter

Resistance and impedance, while often used interchangeably, refer to different elements of a cathodic protection circuit. A high impedance digital multimeter measures the opposition of the flow of a current through a conductor. This tool is especially handy when dealing with the soil around the CP system, as soil resistivity can contribute to inaccurate readings.

Soil Resistivity Meter

Speaking of soil, cathodic protection experts need to know how the ground itself conducts electricity in order to get accurate CP readings. A soil resistivity meter uses probes stuck in the ground at regular intervals to measure how strongly it resists electrical current activity.

If your pipeline’s cathodic protection system is due for an inspection, call Dreiym Engineering to enlist the expertise of certified professionals. Our simple, direct approach utilizes several types of cathodic protection testing equipment and years of firsthand experience in the field.

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About Dreiym Engineering

Dreiym engineering is a full-service engineering company, providing design, consulting, procurement, and construction services. Founded in 2014, we have grown from humble origins to serve our customers in a growing number of engineering fields. Our goal is to find business partners looking for electrical engineering, corrosion engineering, or other engineering services. Our primary office is just north of Houston, Texas, with an additional location in Austin, Texas. Dreiym Engineering is a small company based out of Texas that looks for the best opportunities to partner with companies and customers. We specialize in forensic engineering, fire investigation, and corrosion engineering. Give us a call or email for any questions you may have.

We are also available for any questions you may have about civil or mechanical forensic engineering through our partner engineers that service much of the United States and abroad.

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