庆深气田耐蚀材质抗应力腐蚀开裂性能室内评价

摘要

针对庆深气田集气站加热炉换热盘管材质高温、高含CO2和Cl-的典型工况条件，对13Cr不锈钢、316L奥氏体不锈钢和2205双相不锈钢三种材质进行了抗应力腐蚀开裂性能室内评价实验，明确了实验材质腐蚀的主要类型以及腐蚀形成与温度、CO2分压和Cl-浓度的相关性。实验结果表明，13Cr不锈钢可以作为庆深气田地面系统中分离器、脱水装置等关键设备的选材；316L不锈钢不宜作为加热炉的材质，但是可以应用于分离器、脱水装置、脱碳装置等设备；2205双相不锈钢可用于庆深气田加热炉换热盘管中。%In the light of the typical working conditions of high temperature,high CO2 and Cl- content in the heat coil materials of the gas heating furnace in Qingshen gas field,labora-tory experiments are conducted to evaluate the anti-stress corrosion cracking performance of three different steels which are 13Cr stainless steel,316L austenitic stainless steel and 2205 du-plex stainless steel. The main types of corrosion of the test materials are defined, and the re-lationship between the formation of corrosion and temperature, CO2 partial pressure and Cl-is identified.The results show that 13Cr stainless steel can be used as a key material in separa-tor or dehydration devices in the ground system of Qingshen gas field;316L austenitic stain-less steel is not proper to be used as the material of heating furnace,but can be used in separa-tor, dehydration devices or decarbonization devices, etc.;2205 duplex stainless steel can be used in the heat exchange coil of of Qingshen gas field.