Measuring of Electric Potentials for the Diagnostics of Corrosion Protection of the Metal Structures

Detection of specific features in the functioning of a system for the anti-corrosion protection of underground pipelines at oil and gas enterprises using neural networks

“…In this situation for a pipeline section, taking into consideration polarization potential, it is advisable to apply neural networks with the prediction algorithm that includes a well-developed methodology of structural modeling of direct and alternating voltages and methods of learning, based on the well-developed theory of nonlinear programming [11,12]. The main criterion of the UMP protection is considered to be the difference of potentials between metal and environment, which is called polarization potential (PP) [6].…”

“…To evaluate the resource of oil and gas pipelines, it is necessary to take into consideration the general principles of assessment of strength and durability of the elements of a structure, and the correspondent equipment was described in monograph [5]. However, it does not consider the procedure of modeling of corrosion processes [4] and approaches of correct measurement of polarization potential [6]. The appropriate diagnostic studies make it possible to estimate the levels of economic losses, loss of people's lives and environmental pollution [7].…”

Development of Information Support of Quality Management of Underground Pipelines

“…The polarization potential (PP) U P is considered the main criterion for corrosion protection of metal structures in an electrically conductive medium [32,33]. It is empirically established and confirmed by many studies that the protective PP for steel underground pipelines should be in the range from -0.85 to -1.15 V relative to the mid-sulfate reference electrode (RE) [33].…”

“…These shortcomings of known methods were eliminated using the proposed method for determining the PP with the ohmic component removed from the measurements of constant and variable electric voltages [33]. To get rid of the ohmic component from the measurement of the potential difference U MG , the value of the alternating voltage was set in accordance with the constant using the harmonic coefficient determined from the measurements of the constant U GG and the variable voltage V GG at the same resistance between the reference electrode (RE) and the auxiliary electrode (AE).…”

“…To get rid of the ohmic component from the measurement of the potential difference U MG , the value of the alternating voltage was set in accordance with the constant using the harmonic coefficient determined from the measurements of the constant U GG and the variable voltage V GG at the same resistance between the reference electrode (RE) and the auxiliary electrode (AE). PP is determined by the formula [33]:…”