What principle do galvanic probe meters operate on?

Galvanic probe meters operate on the principle of potential differences of dissimilar metals. This principle is rooted in electrochemistry, where two different metals, when in contact with an electrolyte, can create a voltage due to their differing electrochemical potentials.

When a galvanic probe is employed, one metal acts as the anode (which will oxidize) and the other as the cathode (which will reduce), leading to a measurable electric potential difference. This potential can be indicative of various factors, including corrosion rates or the presence of specific ions in a solution.

This ability to measure the potential difference effectively allows for the monitoring of processes such as corrosion in pipelines or tanks, where different metals are often used and can be exposed to the same electrolyte environment. It is this electrochemical reaction that provides valuable data for engineers to assess material integrity and predict maintenance needs.