Abstract: The corrosion behavior of 20# steel in oilfield production fluid was studied by corrosion weight loss method, tow electrode technology and electrochemical measurement technology. The results show that the corrosion development process can be divided into the initial corrosion stage, the corrosion development period and the corrosion stability period during the experimental period. The corrosion is the most serious in the initial stage of corrosion. The polarity reversal of cathode and anode occurs at the same position of metal with the prolongation of experimental time, and as the temperature increases, the inversion period becomes shorter. Through the electrochemical measurement of the corrosion metal as a whole and in part, it is found that the types of corrosion occur at different temperatures and locations.

Key words: Wire beam electrode, Electrochemical measurement technology, Corrosion cycle, Polarity reversa

摘要： 采用腐蚀失重法、丝束电极技术和电化学测量技术研究了20#钢在油田采出液中的腐蚀行为。结果表明，在实验周期内可将腐蚀发展过程分为腐蚀初期、腐蚀发展期和腐蚀稳定期，腐蚀初期对应腐蚀情况最为严重；金属同一位置随实验时间延长发生阴阳极极性反转现象，并且随着温度升高，反转周期变短；通过对腐蚀金属整体和局部进行电化学测量研究发现，不同温度、不同位置腐蚀发生类型有所差别。

关键词: 丝束电极技术, 电化学测量技术, 腐蚀周期, 极性反转