In a groundbreaking study published in ‘Cailiao Baohu’ (Materials Protection), researchers from the SINOPEC Engineering Group Luoyang R&D Center have shed light on a critical issue affecting the ethylene oxide (EO) and ethylene glycol (EG) production process. Ethylene oxide, a key component in the production of various plastics, is essential for industries ranging from automotive to consumer goods. However, the patented SD process employed in EO/EG units has been plagued by stress corrosion cracking, a problem that can jeopardize both safety and operational efficiency.
Lead author TANG Zhenhua and his team conducted extensive simulations to evaluate the corrosion behavior of refinery-grade stainless steel 304 and 304L materials under the specific conditions found in EO purification towers. Their research revealed that the susceptibility to stress corrosion cracking in these materials is closely tied to a phenomenon known as sensitization. “Our findings indicate that sensitized stainless steel is particularly vulnerable to stress corrosion cracking, which poses significant risks in the harsh environments of EO/EG units,” TANG explained.
The implications of this study extend beyond academic interest; they have profound commercial impacts for the construction and engineering sectors. By understanding the corrosion mechanisms at play, companies can optimize their material choices and processing techniques. This optimization is crucial not only for enhancing the longevity and reliability of production facilities but also for reducing maintenance costs and minimizing downtime. As TANG noted, “Implementing the proposed measures for material and process optimization can significantly enhance the safe and stable operation of EO/EG units, ultimately leading to increased productivity and safety.”
This research could pave the way for new standards in material selection and design for chemical processing facilities, particularly in environments where corrosive agents are prevalent. As industries strive for more sustainable and efficient practices, the insights gained from this study will be invaluable in shaping future developments in the field.
For more information on this research and its implications, you can visit the SINOPEC Engineering Group Luoyang R&D Center’s website at lead_author_affiliation.
