Structure-to-electrolyte potential measurements are the most fundamental process in the field of corrosion control. The purpose of a potential measurement is to obtain a general idea of the ‘health’ of the cathodic protection system. Potential measurements are often referred to as the ‘language’ of corrosion.

Some companies call it taking a read or measuring a key point, but in the end we are all performing the same type of testing. Many of us perform this activity year after year without acknowledging all of the very import factors involved to complete the work effectively. A well-maintained cathodic protection system requires reliable testing in order to verify its status.

This paper discusses the technical aspect of potential measurements along with testing methods and equipment maintenance recommendations. Simple routine maintenance of the multi-meter, test lead wires and reference electrode can ensure productive testing with trustworthy results. The methods and maintenance discussed will cover everything from reference electrode placement during measurement to the proper tools used for rebuilding a reference electrode.

Subject
Test methods, Water, Piping, Cathodic protection, Reference electrodes, Structures, Pipelines, Wiring, Potential measurements, Lead, Copper, Soil, Concrete
Keywords:
potential measurement, reference electrode, structure-to-electrolyte potentials
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2022
Association for Materials Protection and Performance (AMPP)
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