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Currently, there are few comprehensive plans for specialized corrosion monitoring of this system available in public sources. The following are mature monitoring methods tailored to this type of corrosion scenario: Online monitoring of medium components – Electrochemical sensors are installed at pipeline and equipment locations where corrosion is likely to occur, to monitor the concentrations of H₂S and HCN in real time. At the same time, the difference in oil content in circulating water and materials is also detected online, enabling rapid identification of corrosion abnormalities caused by medium leaks. Direct monitoring of corrosion rate is achieved by using resistive and inductive probes installed in areas prone to corrosion, in order to obtain real-time data on the rate of thinning of the metal wall thickness; this allows for accurate detection of the rapid corrosion phase caused by HCN dissolving the FeS protective layer. Hydrogen permeation monitoring: To address the risks of hydrogen bulging and hydrogen-induced cracking, hydrogen flux sensors are used to monitor the concentration of hydrogen penetrating into the steel, thereby providing early warnings about the development of hydrogen embrittlement corrosion. Regular offline inspections, which combine ultrasonic thickness measurement, random metallographic sampling, and hardness testing, are carried out to periodically assess changes in the equipment’s wall thickness as well as the emergence of microcracks, thereby verifying the accuracy of the online monitoring data.