管线钢最常见的H2S环境断裂可分为两类:氢致开裂(HIC)和硫化物应力开裂(SSC)。管线钢的HIC是指在含H2S的油气环境中,因H2S与管线钢作用产生的氢进入管线钢内部而导致的开裂,最常见的表现形式为氢致台阶式开裂。当然,如果裂纹处在钢管近表面,则也常表现为氢鼓泡。管线钢的SSC是指在含H2S的油气环境中,因H2S和应力对管线钢的共同作用产出的氢进入管线钢 The most common H2S environmental fracture in pipeline steel can be divided into two categories: hydrogen induced cracking (HIC) and sulfide stress cracking (SSC). The HIC of pipeline steel refers to the cracking caused by the hydrogen generated by the action of H2S and pipeline steel inside the pipeline steel in the environment containing H2S. The most common manifestation is hydrogen-induced step cracking. Of course, if the crack in the pipe near the surface, it often appears as hydrogen bubbling. The SSC of pipeline steel refers to the hydrogen produced by the combined effect of H2S and stress on pipeline steel in the hydrocarbon-gas environment containing H2S into the pipeline steel