通过失效分析和管道服役环境调查，证明开裂原因是管道服役期间发生硫化物应力腐蚀开裂（SSCC）。管内输送天然气中H2S浓度高、天然气中含水蒸汽、内焊趾附近存在高的附加拉应力、严重的焊接缺陷（咬边、未熔合等）是导致管道焊...
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... 交变应力腐蚀开裂 cyclic stress corrosion cracking 硫化物应力腐蚀开裂 stress cracking ; SSCC 汞致晶界腐蚀开裂 mercury cracking ...
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...格中，使钢的脆性增加，在外加拉应力或残余应力作用下形成的开裂，叫做硫化物应力腐蚀开裂（Sulfide Stress Corrosion Cracking—SSCC或SSC）。工程上有时也把受拉应力的钢及合金在湿H2S及其他硫化物腐蚀环境中产生的脆性开裂统称为硫化物应力腐蚀开裂。
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系统的综述了高强钢化工设备硫化物应力腐蚀开裂机理及常规的影响因素。
The mechanism and general influence factors of sulfide stress corrosion cracking (SSCC) of chemical equipment made of high strength steel are summarized.
本文通过对硫化物应力腐蚀开裂的机理和影响因素的讨论，说明其危害性并提出了控制方法。
Through the discussion on the mechanism and effect factors of the stress corrosion cracking by sulfides, this paper expounds its harmfulness and proposes some measures to control it.
通过失效分析和管道服役环境调查，证明开裂原因是管道服役期间发生硫化物应力腐蚀开裂(SSCC)。
It has been proved that these cracks are caused by sulfide stress corrosion cracking (SSCC) through failure analysis and service environment survey.
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