Measuring IR-Free Potential: Analysis of the Remaining IR Components in the Off Measurements and Importance of the Design of SRE with Integrated Coupon to Obtain it.

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As known, ISO 15589-1 and SP0169 protection criteria refers to IR-Free potentials values to be met by applying cathodic protection to limit corrosion rate and, at the same time, to avoid overprotection: in this respect, according to the type of currents influencing the metallic structure, European standard EN 13509 proposes different measurement techniques for measuring IR Free potential.

Product Number: 51323-18803-SG

Author: Ivano Magnifico

Publication Date: 2023

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As known, main international standards (ISO 15589-1 and SP0169) protection criteria refer to IR-Free potentials values to be met by applying CP to limit corrosion rate and at the same time to avoid overprotection: in this respect, according to the type of currents influencing the metallic structure, EN 13509 standard proposes different measurement techniques for measuring IR Free potential.
Off potential measurements are usually performed, both on pipeline and by means of coupon, to try catching the best approximation for the IR-free potential value: for this reason, a fully understanding of all the components that contribute to the obtained potential measure is of very great importance for making better assessment.