Ammonia pipelines are severely corroded, what measures should we take?

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1. There are three reasons why ammonia water pipelines are prone to corrosion:: 1. Ammonia molecules can form stable complex ions with many metal ions. 2. There is a double electric balance between metal and metal ions. 3. The atmosphere contains a large number of oxygen molecules. Liquid ammonia can dissolve alkali metals and generate a solution containing highly mobile electrons, making the metal more susceptible to oxidation and corrosion of pipelines. 2. Anti-corrosion measures against ammonia pipeline corrosion: The more commonly used and economical methods include repair welding, metal pipe set, new material coating, and even the addition of corrosion inhibitors, etc. Let’s compare the pros and cons below: Repair welding: The advantage is that the effect is more obvious. Repair welding not only has safety hazards, but also causes "alkali embrittlement" after metal welding, which causes leakage to intensify. The more we weld, the more leakage occurs. Moreover, repair welding is a very large source of danger. Set of metal pipes: The disadvantage of installing a section of pipe outside the pipe is that it has a short use time and is suitable for temporary emergencies, but it is unreliable for long-term use. Metal corrosion inhibitor: It has the advantages of easy use, easy to master the technology, and wide range of uses. However, it has strict environmental requirements and has obvious limitations in acid and alkali environments. New material coatings, one of the more representative ones is Sole carbon nanopolymer material. This material not only has a significant effect on corrosion leakage, but also has good comprehensive properties. It can greatly improve the corrosion resistance and erosion performance of ammonia water pipelines, and can also play a role in preventing rust. There are many leakage points in the ammonia water pipeline in the coking workshop of a company. The medium of the leakage point is a mixture of ammonia water and tar, the temperature is between 78 and 82°C, and the pressure is high. Sole carbon nanopolymer material is used to repair it, and the effect is obvious. Here are the repair steps.