CAJ | 학술논문

以某储气库工程为背景，结合 CO2的腐蚀机理及影响因素对该工程工况条件下的集输管线的腐蚀情况进行了深入分析，结果表明：集输管线在0.81 MPa的CO2分压作用下将发生严重的腐蚀破坏，运行温度位于中温区，腐蚀产物膜的耐蚀性差，腐蚀特征以点蚀为主，同时介质流速及Cl-离子的存在进一步加剧了CO2对集输管线的腐蚀。结合腐蚀情况及实际工况条件，比选了几种针对性的腐蚀控制措施，根据最终的经济比选结果及优缺点比较，推荐集输管线选择经济、安全的316L+L450Q形式的复合钢管，后期的试验结果表明：在本工程工况条件下复合钢管的母材及环焊缝焊接接头具备良好的耐蚀性能及力学性能，满足本工程的运行要求。
이모저기고공정위배경，결합 CO2적부식궤리급영향인소대해공정공황조건하적집수관선적부식정황진행료심입분석，결과표명：집수관선재0.81 MPa적CO2분압작용하장발생엄중적부식파배，운행온도위우중온구，부식산물막적내식성차，부식특정이점식위주，동시개질류속급Cl-리자적존재진일보가극료CO2대집수관선적부식。결합부식정황급실제공황조건，비선료궤충침대성적부식공제조시，근거최종적경제비선결과급우결점비교，추천집수관선선택경제、안전적316L+L450Q형식적복합강관，후기적시험결과표명：재본공정공황조건하복합강관적모재급배한봉한접접두구비량호적내식성능급역학성능，만족본공정적운행요구。
Taking a certain gas storage project as the background, combined with CO2 corrosion mechanism and influencing factors, corrosion situation of gathering pipeline under the operating condition of this project was analyzed. The analysis results show that:there will be a severe corrosion in the gathering pipeline under the action of a 0.81 MPa CO2 partial pressure; Due to the medium operating temperature, the corrosion product film shows poor corrosion resistance, and main corrosion characteristic is pitting corrosion. At the same time, the flow rate and chlorine ion can aggravate the corrosion of the gathering pipeline. According to the corrosion situation and the operating condition, several control measures were compared. The comparison result shows that:the composite pipe of 316L+L450Q is the best choice. The experimental results has proved that:the base metal and welding joint of the 316L+L450Q composite both have good corrosion resistance and mechanical properties under the project operating condition.