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Abstract. The proposed method of estimating the conductive plate thickness allows carrying out the nondestructive testing of the objects that are made of conductive materials when there is a possibility of electrical contact with the surface of the object. In particular, the method allows assessing the current state of corrosion changes of irrigation systems in agriculture. The method implies using the Ohm's law in differential form.Keywords: electrodynamics, Ohm's law in differential form, monitoring, corrosion, pipelines. IntroductionThe considerable share of accidents on pipelines because of corrosion of pipes requires urgent researches in the field of anticorrosive protection [1; 2] and creation of monitoring aids of corrosion of pipelines [3][4][5], including irrigation systems in agriculture. The possibility to determine the critical corrosion level and changes in a pipe on the basis of instrumental and analytical forecast allows not only to provide well-timed replacement of pipeline sections but also to substantiate the use of specialized electrical, chemical or mixed corrosion prevention methods.All types of nondestructive testing, which are currently in use, can be divided into three main groups: methods based on the interaction of electromagnetic fields and elementary particles with the test objects; methods based on the use of acoustic fields; methods based on the interaction of penetrating substances with the objects under control [6].Electric NDT is based on recording the parameters of the electric field interacting with the object under control or occurring in a controlled object as a result of external influence.The method for assessing the conducting plate thickness put forth below allows measuring the degree of integrity of any metal equipment or structure and also allows evaluating both electrochemical and mechanical actions [7].