Kovalov D. The diagnosing stages of corrosion and mechanical destruction of stainless steel electrochemical pulse method

The object of study is corrosion and mechanical destruction of austenitic stainless steel with simultaneous action of corrosive environment and mechanical loads. The aim of the study is diagnose the technical condition of equipment chemical production of austenitic stainless steel by electrochemical pulse method control corrosion and mechanical damage on the basis quantitative evaluation stages its development. Research methods - corrosion-fatigue tests of steel and potentiostatic voltammetry was carried out to determine stages corrosion and mechanical destruction. A new methodology for assessing state of austenitic stainless steel constructed on asis of the three-parameter criterion attributes of emergence macro-cracks in equipment during development their corrosion and mechanical damage. Techniques and tools are implemented to research and production enterprise "Microtherm" (Severodonetsk), " Research Institute of Chemical Engineering" (Severodonetsk) and "EKOR" (Severodonetsk). For the first time regularities of quantitative electrochemical parameters change over time: the electrode potential, amplitude and intensity of electrochemical pulses depending on the stage of corrosion-mechanical destruction austenitic stainless steels. Created by measuring means of electrochemical pulse method is developed on the basis of electrical and concepts for which the proposed new algorithms for processing the measured signals. By techniques and tools can be used for the introduction to "Severodonetsk Association "Azot" and "Rovnoazot".