摘要
采用动电位极化和电化学阻抗方法,研究了CT80连续油管钢在不同温度(20,40,60,80℃)的3.5%NaCl溶液中的腐蚀行为。结果表明,随着温度的升高,CT80钢的开路电位呈现先负移后正移的趋势,在60℃时达到最小;CT80钢的自腐蚀电流密度呈先升高后降低的趋势,在60℃时具有最大的自腐蚀电流密度,腐蚀速率最大;CT80钢的极化电阻随温度升高呈先减小后增大的趋势,在60℃时极化电阻最小,相应的腐蚀速率最大。
Potentiodynamic polarization measurement and electrochemical impendence spectroscopy were employed to investigate the corrosion behavior of CTS0 coiled tubing steel in 3.5% NaCl solution at different temperature（20 ℃, 40 ℃, 60 ℃, 80 ℃）. The results showed that with the rise of temperature, the open circuit potential of CT80 coiled tubing steel shifted to the negative direction and then to the positive direction, it reached the minimum at 60 ℃, the corrosion current density of high CT80 coiled tubing steel firstly increased then decreased, it reached the maximum at 60 ℃, and its corrosion rate came to the maximum at 60 ℃ ,and the polarization resistance of CT80 coiled tubing steel firstly decreased and then increased, it reached the minimum at 60 ℃ with the maximum corrosion rate.
出处
《腐蚀与防护》
CAS
北大核心
2015年第3期245-249,共5页
Corrosion & Protection
关键词
CT80钢
温度
动力学参数
开路电位
电化学阻抗谱
CT80 steel
temperature
dynamic parameter
open circuit potential
electrochemical impedancespectroscopy （EIS）
