ABSTRACT

Electrical resistance (ER) probes are a technique used to monitor the corrosion rate (CR) of metals in a wide range of applications and industries. However, limited data comparing CR measured with ER-probes, weight loss and electrochemical methods is available. The aim of this work is to provide data regarding the reliability of CR measurements with ER-probes by comparison with LPR, EIS and weight loss measurements and to provide suggestions for designing ER-probes depending on the expected corrosion mechanism and CR. To evaluate the ER-probes reliability in CR measurements, both uniform and localised corrosion in four different environments were studied. CRs obtained with ER-probes showed good agreement with weight loss and electrochemical measurements. Numerical models were used to optimise ER-probe geometry regarding the expected corrosion type and CR, and to study the effect of Joule heating. Design charts were proposed to support ER-probes design concerning the expected CR in certain applications.

摘要

电阻 (ER) 探头是一种用于在广泛的应用和行业中监测金属腐蚀速率 (CR) 的技术。然而，比较 CR 与 ER 探针、重量损失和电化学方法测量的数据有限。这项工作的目的是通过与 LPR、EIS 和重量损失测量的比较，提供有关 ER 探针的 CR 测量可靠性的数据，并根据预期的腐蚀机制和 CR 为设计 ER 探针提供建议。为了评估 ER 探针在 CR 测量中的可靠性，研究了四种不同环境中的均匀腐蚀和局部腐蚀。用 ER 探针获得的 CR 与重量损失和电化学测量结果非常吻合。数值模型用于优化关于预期腐蚀类型和 CR 的 ER 探针几何形状，并研究焦耳加热的影响。提出了设计图表以支持有关某些应用中预期 CR 的 ER 探针设计。