Monitoring corrosion rates with ER-probes – a critical assessment based on experiments and numerical modelling. (3rd April 2022)

• Record Type: Journal Article
• Authors: Martinelli-Orlando, Federico; Angst, Ueli
• Is Part Of: Corrosion engineering, science, and technology. Volume 57:Number 3(2022)
• Page Start: 254
• Page End: 268
• Publication Date: 2022-04-03
• Subjects: Electrical resistance probe -- corrosion rate -- uniform corrosion -- localised corrosion -- electrochemical measurements -- weight loss measurements; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1080/1478422X.2022.2053036
• Languages: English
• ISSNs: 1478-422X

Abstract

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.