What are some good methods for online monitoring of corrosion in refining equipment?

Corrosion coupon monitoring, resistive probe monitoring, ultrasonic non-destructive testing, periodic thickness measurement at fixed points

I often hear about two testing methods: resistance probe monitoring and ultrasonic non-destructive testing

Take a look at this: Online corrosion monitoring for oil refining equipment. http://bbs.hcbbs.com/thread-81167-1-1.html. Add a bit more content: 1) Expand the monitoring scope. Each device is expanded to include critical equipment and pipelines in accordance with the principle of thickness measurement point placement ； Resistive or magnetoresistive probes are installed at key locations to enable real-time monitoring ； Bypass reactors are added in areas with high temperatures and high sulfur levels, and various test coupons made of different materials are installed there to help understand the corrosion mechanisms ； Exploratory work is being carried out on the monitoring of sulfide stress corrosion cracking (SSCC) in austenitic stainless steels. 2) A combination of indirect monitoring of dielectric parameters and direct monitoring of corrosion rate. Material corrosion occurs under certain environmental conditions; changes in the medium are the cause, while changes in the corrosion rate are the result. Only through effective and coordinated monitoring of both can the causes of corrosion be identified, thereby enabling its control. 3) There must be specialized personnel responsible for monitoring corrosion during the operation of the equipment, as well as conducting corrosion investigations during periods of shutdown. The advantage of doing this is that it facilitates the accumulation of monitoring experience and the improvement of monitoring capabilities ； It facilitates the comprehensive processing of monitoring data ； It facilitates accurate judgment of abnormal situations. 4) Standardize the management of equipment corrosion and protection, and establish a unified enterprise database for equipment corrosion. The content of the database should include: process data, equipment data, corrosion monitoring data, etc. This database can be used to provide an accurate assessment of the corrosion status of equipment, predict the trend of corrosion development, and serve as a basis for maintenance work. Last edited by Li Xuegang on 2009-2-12 at 10:58.]

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