Ethylene oxide(EO)is a crucial organic synthesis raw material,ranking just behind polyethylene and polyvinyl chloride,and is primarily used in the production of ethylene glycol(EG).The SD process for EO/EG units(a patented EO/EG technology from SD Company in the United States)suffers from typical stress corrosion problems.To address this,the corrosion behavior and mechanisms of refinery-grade 304 and 304L materials in typical environments such as EO purification towers were simulated.Stress corrosion cracking susceptibility of the two materials was evaluated through slow strain rate testing.Results showed that the stress corrosion in EO/EG units was associated with the sensiti-zation of stainless steel,with sensitized 304 and 304L stainless steel exhibiting susceptibility to stress corrosion cracking.Corresponding meas-ures for material and process optimization were proposed,providing technical support to enhance the safe and stable operation of EO/EG units.
关键词
环氧乙烷精制塔/慢拉伸/敏化/304和304L/应力腐蚀开裂敏感性
Key words
ethylene oxide refining tower/slow stretching/sensitization/304 and 304L/sensitivity to stress corrosion cracking
维普
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