超级13Cr马氏体不锈钢在入井流体与产出流体环境中的腐蚀行为研究  

Corrosion Behaviors of Super 13Cr Martensitic Stainless Steel Under Drilling and Completion Fluids Environment

作　　者：刘亚娟[1,2] 吕祥鸿[1] 赵国仙[1] 陈长风[2] 薛艳[3] 

机构地区：[1]西安石油大学材料科学与工程学院,西安710065 [2]中国石油大学(北京)材料科学与工程系,北京102249 [3]西安摩尔石油工程实验室,西安710065

出　　处：《材料工程》2012年第10期17-21,47,共6页Journal of Materials Engineering

摘　　要：通过模拟油田超深超高压高温油气井腐蚀环境,研究超级13Cr马氏体不锈钢管材抗均匀腐蚀、点蚀、应力腐蚀开裂(SCC)及酸化液腐蚀的性能。研究结果表明:随着井深的增加,超级13Cr马氏体不锈钢的均匀腐蚀速率逐渐增大,且气相的均匀腐蚀速率要大于液相的腐蚀速率,但不论在液相还是在气相腐蚀条件下,均匀腐蚀速率均远小于0.1mm/a;由于超级13Cr马氏体不锈钢有较高的Mo,Ni含量,在模拟腐蚀环境中未出现明显点蚀现象,且具有良好的抗SCC性能;循环酸化腐蚀试验后试样管体和接箍部分没有出现点蚀、缝隙腐蚀等局部腐蚀迹象。By simulating drilling and completion fluids environment, the performance of super 13Cr martensitic stainless tubular products against uniform corrosion, pitting, stress corrosion cracking （SCC） and acid liquid corrosion was studied. The results indicate that the uniform corrosion rate of super 13Cr martensitic stainless steel increases as the well depth increases. Further,the uniform corrosion rate of super 13Cr in gas phase is higher than the one in the liquid phase,but it is far less than 0. lmm/a both in liquid phase and gas phase corrosion conditions. Since super 13Cr martensitic stainless steel contained relatively higher Mo and Ni element, obvious pit corrosion and stress corrosion cracking did not occur under simulating corrosion environment. After the cyclic acid corrosion test,local corrosion including pitting,crevice corrosion,etc. , did not occur either on the pipe body or on the coupling.

关 键 词：超级13Cr马氏体不锈钢 均匀腐蚀 点蚀 应力腐蚀开裂(SCC) 循环酸化 

分 类 号：TG172.8[金属学及工艺—金属表面处理]