PSI - Issue 81

Roman Dzhala et al. / Procedia Structural Integrity 81 (2026) 98–101

101

Fig. 1. Non-destructive testing of the distribution of the transition resistance of an underground pipeline using non-contact current measurements. Detection of damage to the insulation of the pipeline.

Fig. 2. Non-destructive testing of the distribution of polarization potential of an underground pipeline by contact measurements of electrical voltages. Detection of corrosion sites of the pipeline.

Conclusions The method of NDT ACP UP is based on non-contact measurements of UP current distribution, detection of places of anomalously high current consumption (indicating places of unsatisfactory UP insulation) with subsequent primary contact control of protective potentials in these places with unsatisfactory insulation. As shown by the experimental studies, field tests and operation in real conditions, the NСM methodology and equipment significantly (by 3-5 times) increase the informativeness and efficiency of UP examinations. The results are intended for informed planning of the volumes and types of maintenance and repair in order to prevent corrosion damage and extend the terms of trouble-free operation of expensive, socially and economically significant pipeline systems. Such method can be used to improve regulatory documentation in order to optimize the system of diagnostic examinations and control of UP ACP. References DSTU 4219-2003. Steel main pipelines. General requirements for corrosion protection. Kyiv: Depzhstandart of Ukraine. Dzhala, R., Dzhala, V., Savula, R., Senyuk, O., Verbenets’ , B. 2019. Determination of components of transient resistance of underground pipeline. Procedia Structural Integrity 16, 218-222. Dzhala, R.M., Dikmarova,L.P., Dzhala, V.R., Verbenets ’ , B.Ya. 2024. Electromagnetic control of underground pipelines insulation. Kyiv: Naukova Dumka, Р. 260. (in Ukrainian). Kryzhanivs’kyi , E. І . and Nykyforchyn, H.M., 2011. Specific features of hydrogen-induced corrosion degradation of steels of gas and oil pipelines and oil storage reservoirs. Materials Science 47(2), 127 – 138. Ostapenko, V. M., Yagupolska, L.N., Lukovych, V.V., Kokhanovskyi, I.M., Egorov, E.V., Kuzmenko, Yu.O.& Kalkutin, Yu.G. 1988. Electrochemical protection of pipelines against corrosion. Kyiv: Naukova dumka, 192 p. (in Ukrainian). Slobodyan, Z. V., Nykyforchyn, H. M., Petrushchak, O. I., 2002. Corrosion resistance of pipe steel in oil-water media. Materials Science 38, 424 – 429. Uhlig, H. H. & Revie, R. W. 1985. Corrosion and corrosion control. An Introduction to Corrosion Science and Engineering. Third Edition .AWiley Interscience Publication. NewYork – Chichester – Brisbane – Toronto – Singapore. 456 p.