How can manufacturing enterprises address the issue of component corrosion? (Reply with insightful praise) ； Flood irrigation is strictly prohibited! ）
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Most of the malfunctions that occurred during urea production were related to component failures, including those in the compressor control system and Siemens CPUs. In many cases, problems arose suddenly during normal operation, causing the system to shut down. There were also instances where multiple redundant CPUs failed simultaneously, resulting in damage to various devices. After analysis with the manufacturer, it was determined that such failures were caused by corrosion from compounds of sulfur and nitrogen. We took the following measures: 1. Changed the air conditioning system in the electronic room to an internal circulation system； 2. Hermetically seal the electronics compartment ； 3. Continuously blow instrument air into the electronics compartment ； 4. Strengthen inspections to identify problems promptly. But doing this still did not prevent the card from getting damaged. The manufacturer said that these card fittings are already corrosion-resistant, and agreed to replace them with ones of a higher corrosion resistance level; it remains to be seen if this will make a difference. I hope to get guidance from experienced mentors to see if more effective measures can be taken to prevent this. Last edited by flyyi61 on 2009-2-3 10:16]
It seems that whenever a solution is found, our company faces the same problem: no matter how advanced the card components are, corrosion still occurs
Apply an insulating anti-corrosion coating to the card.
Unless air pollution is extremely severe, it cannot be concluded that corrosion is caused by sulfur and nitrogen compounds. In fact, humidity control is the most important factor; if humidity is well controlled, even in the presence of sulfur and nitrogen compounds, corrosion will be limited. The air conditioning systems are meant for equipment, not for people, so they should not be adjusted according to people’s preferences. Additionally, when using instrument air to create a positive pressure environment, it is essential to monitor the dew point of this air (in many factories, the dehumidification of instrument air is not done properly). Otherwise, the air conditioning system’s dehumidification capabilities will be ineffective if they do not match the volume of instrument air used. Another issue that cannot be ignored is that, since corrosion already occurs, it is very important to clean the existing instrument cabinets; otherwise, new components will still suffer from corrosion. This post was last edited by CHEN333 on 2009-2-3 at 15:04
A layer of anti-corrosion material is applied to the card holders, and the cabinets feature positive pressure sealing
This type of corrosion is actually a form of environmental corrosion. Upon on-site inspection, if sealing is possible, then fill it with nitrogen – use high-purity nitrogen, replacing the tank every few days; the daily cost is around 30 yuan. By removing oxygen from the air, the situation will improve.
This question seems to have been asked on other forums as well: lol HaiChuan also has a similar issue: http://bbs.hcbbs.com/thread-283286-1-1.html It’s mainly due to the formation of complexes between ammonia and copper. In addition to raising the IP rating of the enclosure and creating a positive pressure inside it by using compressed air, the sealing performance of the enclosure is also improved. When selecting fasteners, it should be noted that some of them have properties that protect against gas corrosion; this is achieved by applying a layer of glue to the circuit boards, or sometimes asphalt is used (in which case the components cannot be repaired).
To address the corrosion of circuit cards, it is necessary to start by improving the conditions in the server room. If there is too much dust in the working environment of these circuit cards, it increases the contact resistance at the contacts, thereby reducing the heat dissipation capabilities of the components； It reduces the insulation resistance of the circuit board, affecting the proper operation of the system. Therefore, the floor of the machine room must be cleaned from time to time (using a vacuum cleaner or mop to keep it clean), in order to maintain cleanliness inside the room. Near computer control rooms, interference from sound, light, electrical, and magnetic fields should be avoided (especially in areas where high voltages are present). The normal operating temperature for the card is between 15°C and 35°C, with the relative humidity to be maintained between 60% and 20%; the humidity should not be too high nor too low.
This post was last edited by Ruyi on 2015-5-18 at 15:34. The best solution is to use the “Advanced Protection Technology for Electronics and Electrical Devices”; this technology provides excellent corrosion protection for electronic/instrument/electrical equipment! Below is a comparison of the anti-corrosion effects of this technology on circuit boards operating in sulfur dust environments: http://down.hcbbs.com/forum/201408/16/231439ugy6jjv6qmmannri.png For more details, please contact the email address 295949814@qq.com
Prevention method: Strictly manage leaks at chemical plants to prevent any NH3 leakage. It is clearly inorganic ammonia that corrodes the copper in the key, causing this issue. This type of corrosion occurs very rapidly. If the leakage issue cannot be resolved on-site, then protection by positive-pressure N2 sealing is the only option.
This post was last edited by yuchenchf on 2017-3-20 at 13:47. We specialize in chemical filtration and have experience in protecting cabinet-type installations as well as control rooms