摘要
采用高温高压反应釜进行模拟腐蚀试验,探究了油井管材料N80钢和13Cr钢在不同温度和O_(2)分压下多元热流体环境中的腐蚀行为;通过失重法评价了材料的腐蚀速率,并结合激光共聚焦显微镜、扫描电子显微镜(SEM)、X射线衍射仪(XRD)等测试方法,分析了两种材料腐蚀速率及腐蚀产物的变化规律。结果表明:当温度超过180℃时,两种材料的腐蚀速率均随温度的升高而增大,腐蚀产物中有Fe_(3)O_(4)生成;而随着O_(2)分压的升高,腐蚀产物逐渐由FeCO_(3)转变为Fe_(3)O_(4),两种材料的腐蚀速率均增大;当O_(2)分压达到0.2 MPa以上时,腐蚀产物全部转变为Fe_(3)O_(4),均匀腐蚀和局部腐蚀加重。
The corrosion behavior of oil well pipe materials N80 steel and 13Cr steel in multi-component thermal fluid environment at different temperatures and O_(2) partial pressures was investigated by simulated corrosion test in high temperature and high pressure reactor.The corrosion rates of the materials were evaluated by weight loss method.The change rule of corrosion rate and corrosion products of the two materials were analyzed by laser confocal microscopy,scanning electron microscopy(SEM) and X-ray diffraction(XRD).The results showed that when the temperature exceeded 180 ℃,the corrosion rate of the two materials increased with the increase of temperature,and Fe_3O_(4) was formed in the corrosion products.With the increase of O_(2) partial pressure,the corrosion products gradually changed from FeCO_(3) to Fe_(3)O_(4),and the corrosion rates of two materials were increased.When the O_(2) partial pressure was above 0.2 MPa,the corrosion products were all transformed into Fe_(3)O_(4),and the uniform corrosion and local corrosion were aggravated.
作者
杨立红
马昊哲
贾小兰
黄伟
YANG Lihong;MA Haozhe;JIA Xiaolan;HUANG Wei(Research Institute of Petroleum Exploration and Production,SINOPEC,Beijing 100083,China;College of New Energy and Materials,China University of Petroleum-Beijing,Beijing 102249,China)
出处
《腐蚀与防护》
CAS
CSCD
北大核心
2023年第9期1-7,共7页
Corrosion & Protection
