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Electrochemical Tests on the Optimum Cathodic Protection Potential of X70 Steel in the Presence of AC Interference

机译:交流电干扰下X70钢最佳阴极保护电位的电化学测试

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摘要

The presence of alternating current (AC) may cause serious damage on buried pipelines even when the off-potential matches -0.85V CSE criterion. The optimum cathodic protection potential (OCPP) is proved to be a more accurate parameter of cathodic protection. This paper applied electrochemical impedance spectroscopy (EIS) to investigate the OCPP of X70 steel in soil simulating solution. The results of laboratory experiments proved that electrochemical methods can determine the OCPP and suggested the OCPP ofX70 steel -900 mVSCE when AC induced voltage was less than6V while about -1000 VSCE when it was more than 7V.
机译:交流电(AC)的存在即使在电位差等于-0.85V CSE准则的情况下也可能对埋地管道造成严重损害。最佳阴极保护电位(OCPP)被证明是更准确的阴极保护参数。本文应用电化学阻抗谱(EIS)研究了X70钢在土壤模拟溶液中的OCPP。实验结果表明,电化学方法可以测定OCPP,建议交流感应电压小于6V时X70钢为-900 mVSCE的OCPP,大于7V时为-1000 VSCE的OCPP。

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