应用动电位极化、电化学阻抗谱和浸泡实验方法研究了CT80连续油管钢试样在60℃模拟长庆油田高矿化度油井水溶液中的腐蚀行为.CT80钢试样的开路电位随腐蚀时间而变化.腐蚀过程是受活化和扩散控制,具有较高的腐蚀速率:预腐蚀后,腐蚀产物膜的形成产生一定的电阻极化,腐蚀速率明显降低.在浸泡实验中,随着浸泡时间的延长试样平均腐蚀速率逐渐下降,但产生严重的点腐蚀现象.
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