PSI - Issue 16

Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com Scienc Direct StructuralIntegrity Procedia 00 (2019) 000 – 000

www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 16 (2019) 218–222

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers. © 2019 The Author(s).Published by Elsevier B.V. Peer-review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers Keywords: Metal in the environment; pipeline; corrosion protection; insulation; soil; cathodic polarization; transient resistance components; current; potential; testing. Components of transient resistance (TR) of underground pipelines are required during the design and co trol of their anti corrosion protection and diagnostics of their technical condition. Disadvantages of traditional contact methods of measuring TR are shown. The new possibilities for determining the distribution of TR "pipe – earth" along the route and its components (resistivity of insulation, soil, polarization) on the pipeline sections by contactless measurements of currents and contact potentials measurements and taking into account the established connections between the components of electric field near underground pipeline are described. © 2019 The Author(s).Published by Elsevier B.V. Peer-review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers Keywords: Metal in the environment; pipeline; corrosion protection; insulation; soil; cathodic polarization; transient resistance components; current; potential; testing. 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” Determination of components of transient resistance of underground pipeline Roman Dzhala a *, Vasyl’ Dzhala a , Roman Savula b , Oleh Senyuk a , Bohdan Verbenets’ a a Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, 5 Naukova St., Lviv, 79060, Ukraine; b Public Joint- Stock Company “UKRTRANSGAZ”– Affiliate “Lvivtransgaz”, 3 Rubchaka St., Lviv, 79053, Ukraine; 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” Determination of components of tra sient resistance of underground pipeline Roman Dzhala a *, Vasyl’ Dzhala a , Roman Savula b , Oleh Senyuk a , Bohdan Verbenets’ a a Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, 5 Naukova St., Lviv, 79060, Ukraine; b Public Joint- Stock Company “UKRTRANSGAZ”– Affiliate “Lvivtransgaz”, 3 Rubchaka St., Lviv, 79053, Ukraine; Abstract Components of transient resistance (TR) of underground pipelines are required during the design and control of their anti corrosion protection and diagnostics of their technical condition. Disadvantages of traditional contact methods of measuring TR are shown. The new possibilities for determining the distribution of TR "pipe – earth" along the route and its components (resistivity of insulation, soil, polarization) on the pipeline sections by contactless measurements of currents and contact potentials measurements and taking into account the established connections between the components of electric field near underground pipeline are described. Transient resistance (TR) "pipe – earth" is a generalized parameter that adequately characterizes an efficiency of protective layer of an underground pipeline (UP). A distribution of transient resistance along pipeline enables an identification of areas with breaching of insulation, predict corrosion damaging and plan repair works to ensure a Transient resistance (TR) "pipe – earth" is a generalized parameter that adequately characterizes an efficiency of protective layer of an underground pipeline (UP). A distribution of transient resistance along pipeline enables an identification of areas with breaching of insulation, predict corrosion damaging and plan repair works to ensure a Abstract 1. Introduction 1. Introduction

* Corresponding author. Tel.: +38 032 229 6709; fax: +38 032 263 3533. E-mail address: dzhala@ipm.lviv.ua

2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers 2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers * Corresponding author. Tel.: +38 032 229 6709; fax: +38 032 263 3533. E-mail address: dzhala@ipm.lviv.ua

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers. 10.1016/j.prostr.2019.07.044