For decades, pipeline integrity programs leaned heavily on scheduled inspection intervals and a single set of corrosion coupons installed at a handful of monitoring points. That is changing fast. Across crude, gas, and water gathering systems, operators are moving corrosion monitoring closer to the front line— deploying more coupons, adding electrical-resistance (ER) probes, and reading corrosion rates continuously rather than once per turnaround.

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.

To conduct a comprehensive metal corrosion test, preparation of the metal test piece is essential. The test piece is initially weighed and then subjected to a specific duration within the test system, typically ranging from 30 to 90 days. Following this exposure period, the test piece is removed for corrosion observation, cleaning, and re-weighing.

Corrosion coupon monitoring, as one of the fundamental techniques for corrosion assessment, offers simplicity in operation and high data reliability. It serves as a vital criterion for equipment and pipeline material selection. Shengli Refinery currently employs two primary corrosion coupon monitoring methods.

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.

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.