普光气田净化厂胺液（MDEA溶液）系统大量采用了316L不锈钢材料，设计之初预计集输流程会分离所有氯离子，但实际使用过程中，发现胺液中的氯离子含量逐渐升高，最高达到8 000 μg/g。为评估普光气田胺液系统中316L不锈钢的使用安全性，通过模拟工况应力腐蚀试验研究了316L不锈钢在含氯胺液中的应力腐蚀开裂行为。结果表明：胺液具有很好的保护性能，316L钢在高含硫含氯胺液环境中具有很好的韧性，未发生应力腐蚀开裂。研究认为，胺液中的特殊环境，使得具有毒化功能的硫离子被络合，从而避免了发生硫化物应力腐蚀开裂的可能性。而胺液的碱性环境，也使得发生氯化物应力腐蚀开裂的门槛值显著上升。

316L stainless steel was used in Puguang gas field purification plant as amine (MDEA) system piping and equipment. At the beginning of design, it was expected that the process of gathering and transportation could separate all of the chlorine ion. In fact, the chloride ion concentration gradually increased and can reached a maximum of 8 000 μg/g in MDEA solution. In order to evaluate the safety of 316L stainless steel used in Puguang amine system, the stress corrosion cracking behavior of 316L stainless steel in chloride containing MDEA solution was investigated by stress corrosion tests which simulated working conditions. The results showed that MDEA solution exhibited a good protection performance. The 316L stainless steel in high hydrogen sulfide factional pressure chloride containing MDEA solution environment had a good toughness, without the occurrence of stress corrosion cracking. Studies suggested that the MDEA solution could complex sulfide ion and hydrogen sulfide, which had a poisoning effect for sulfide stress corrosion cracking, thus avoided the possibility of sulfide stress corrosion cracking. The alkaline environment of the MDEA solution also makes the threshold value of chloride stress corrosion cracking significantly increased.