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生产工作在硫化氢含量达25%的天然气产地用的装置,要求专用的无氢脆倾向的结构钢。由于和潮湿气体的相互作用的结果,按下列反应,在钢的表面上形成活性(单质)氢:H_2S+Fe(?)FeS+2H根据众所周知的氢脆起因的概念,单质氢具有易侵入钢内扩散并能在应力集中的地方聚集。在夹杂一基体分界面上,为裂纹产生和发展建立了良好条件(位移迁移率下降,原子间键减弱,平面压力等等)。
Production facilities in natural gas production sites with hydrogen sulfide content of 25% require dedicated structural steels that are free of hydrogen embrittlement. As a result of the interaction with moist gas, active (elemental) hydrogen is formed on the surface of the steel as follows: H 2 S + Fe (?) FeS + 2H According to the well-known concept of hydrogen embrittlement, elemental hydrogen has a tendency to intrude into steel Diffusion inside and can gather in places where stress is concentrated. At the inclusion-matrix interface, favorable conditions for crack initiation and development (decreased mobility of migration, weakened atomic bonds, plane pressure, etc.) were established.