Corrosion monitoring can be conducted either periodically or continuously, with the monitoring frequency being influenced by the chosen monitoring technique, the extent of corrosion on the target component, and the associated monitoring expenses. The corrosion monitoring approach dictates the speed at which corrosion rates can be assessed. For instance, while corrosion coupons typically necessitate monitoring intervals exceeding a month, resistance probes can offer more frequent readings, ranging from hours to days.

When positioning probes, it is crucial to consider the desired test conditions, particularly temperature and flow rate

​Over the years, the technology behind electrical resistance probes has undergone significant advancements, transforming it from its early manual and portable form to an advanced automatic recording system capable of online monitoring. This evolution has made resistance probe monitoring a standard practice in China's refining sector post-2000. The technology is highly regarded for its exceptional sensitivity, rapid response, robust anti-interference capabilities, and broad applicability.

Corrosion Monitoring Probes are key in checking and managing how much corrosion is happening, and they give important information that can help stop potential issues and keep our systems working well.

Corrosion monitoring is crucial for maintaining metal structures. Electrical Probes offer advantages such as non-intrusive monitoring, temperature compensation, and compatibility with corrosion protection measures.

When the etching rate is low or the etching rate changes frequently with other parameters, we should use sensitive thin components. Thicker components will last longer if the corrosion rate is high. The best compromise between sensitivity and longevity depends on the environment.

Resistance probe measurement can track the corrosion behavior of metal surface in real environment. It can also master the corrosion rate and corrosion condition. Therefore, we can take corresponding anti-corrosion measures in time. Or take timely measures to control the corrosion rate within the required range. The establishment of resistance probe measurement method can timely display the corrosion of equipment and pipelines, quickly find abnormal corrosion conditions, and avoid safety production caused by equipment corrosion. It is an effective corrosion detection method.

At present, there are many methods for determining the corrosion rate, such as gravimetric method, volume method, polarization curve method (polarization resistance method) and so on. Gravimetric method is a classic method, which is suitable for laboratory and field coupons. It is one of the most reliable methods for determining the corrosion rate of metals. It can be used to detect the corrosion resistance of materials, select corrosive agents, and check the anti-corrosion effect when changing process conditions.

The main component of Corrosion Probes is a metal sensing element. The element is destroyed after the probe is corroded by the medium in the environment in which it is used. Then its geometry changes. Using Ohm’s law, the resistance of a metal element is related to its geometric size. Finally, by measuring the resistance change of the element before and after corrosion. Combining the time monitoring of the two monitoring readings, we can calculate the corrosion rate (mm/a).