What are the corrosion inhibitors for ethylene glycol aqueous solution (coolant) pipelines? What substances are generally added?
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Ethylene glycol aqueous solution was used as a cooling medium; no chemicals had been added to it previously, but during maintenance work corrosion was detected in the relevant pipelines. What are the types of corrosion inhibitors available for ethylene glycol solutions? Does anyone know what substance it is?
The ethylene glycol corrosion inhibitor N-587 (types I, II, III) is suitable as a corrosion inhibitor in chilled water systems that use salts containing ethylene glycol as coolants. It can also be used in antifreeze solutions, oil tankers, and oil tanks to provide corrosion protection for the aqueous phase, thereby addressing the issue of corrosion at the waterline. It is likewise appropriate for central air conditioning chilled water systems. Ethylene glycol corrosion inhibitors are primarily composed of corrosion inhibitors, dispersants, etc., and are among the most widely used and highly effective corrosion inhibitors in current cryogenic brine systems.
Thank you! Does anyone know the specific components of the corrosion inhibitor?
Ethylene glycol functions as a metal protector, providing some degree of corrosion inhibition; water present can cause corrosion in pipelines, and it is also possible that ethylene glycol contains acidic organic substances (polymers). To avoid corrosion, adjust the pH to a slightly alkaline level; you might want to give it a try
There are many types of ethylene glycol corrosion inhibitors, and the choice depends on the extent of corrosion caused by ethylene glycol. Adding any of these inhibitors to a fresh ethylene glycol solution can have some effect, though the degree of effectiveness varies. Some inhibitors offer stronger corrosion resistance and last longer, but in cases where corrosion is already severe, it is necessary to turn to specialized manufacturers of products for combating ethylene glycol corrosion. Through testing and monitoring, different formulations with various proportions can be used to address the issue. There are professional articles available online that provide information on ethylene glycol solution corrosion.