Determination of processing conditions for a heat-resistant superalloy used in turbine elements

Authors

DOI:

https://doi.org/10.15587/1729-4061.2024.313452

Keywords:

turbine elements, electrochemical dissolution, methanesulfonic acid, hydrochloric acid, sodium chloride, sulfuric acid

Abstract

A heat-resistant superalloy from destroyed special equipment was used for further processing to extract valuable metals such as rhenium, nickel, cobalt, tungsten, molybdenum, niobium, tantalum, and others. The need to develop an effective method for the electrochemical dissolution of this superalloy is due to the shortage and high cost of the component metals, especially rhenium. The electrochemical dissolution method is effective for the rapid and complete dissolution of such hard alloys, optimizing the extraction process of valuable components.

In the course of the work, the composition of the unknown superalloy was determined, and the possible grade of the alloy was identified as JS32-VI. For the first time, a comparison of the anodic behavior of the heat-resistant superalloy containing rhenium in various electrolyte solutions, including methanesulfonic acid, was carried out. This comparison helped determine which electrolyte is best suited for dissolving the superalloy and extracting valuable metals from it.

The results showed that solutions containing chloride ions (NaCl and HCl) are the most effective for the electrochemical dissolution of the superalloy. These results are explained by the fact that chloride ions help remove the passive oxide film from the metal surface. Thus, chloride solutions provide more effective dissolution of the superalloy compared to methanesulfonic acid and sulfuric acid.

The key finding of the study is the identification of chloride solutions as the most effective for dissolving the superalloy, which optimizes the process of extracting valuable metals. The application of these methods will contribute to resource conservation and the reduction of production costs, which is important for industries using such materials

Author Biographies

Valerii Kotok, Ukrainian State University of Chemical Technology

PhD, Associate Professor

Department of Processes, Apparatus and General Chemical Technology

Tatyana Butyrina, Ukrainian State University of Chemical Technology

PhD, Associate Professor

Department of Technology of Inorganic Substances and Ecology

Yuri Sknar, Ukrainian State University of Chemical Technology

Doctor of Chemical Sciences, Head of Department

Department of Processes, Apparatus and General Chemical Technology

Oksana Demchyshyna, Kryvyi Rih National University

PhD, Associate Professor

Department of Mineral Processing and Chemistry

Anna Liashenko, Kryvyi Rih National University

Researcher

Department of Mineral Processing and Chemistry

Irina Sukha, Ukrainian State University of Chemical Technology

PhD, Associate Professor

Department of Technologies of Natural and Synthetic Polymers, Fats and Food Products

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Determination of processing conditions for a heat-resistant superalloy used in turbine elements

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Published

2024-10-30

How to Cite

Kotok, V., Butyrina, T., Sknar, Y., Demchyshyna, O., Liashenko, A., & Sukha, I. (2024). Determination of processing conditions for a heat-resistant superalloy used in turbine elements. Eastern-European Journal of Enterprise Technologies, 5(12 (131), 6–12. https://doi.org/10.15587/1729-4061.2024.313452

Issue

Vol. 5 No. 12 (131) (2024): Materials Science

Section

Materials Science

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Copyright (c) 2024 Valerii Kotok, Tatyana Butyrina, Yuri Sknar, Oksana Demchyshyna, Anna Liashenko, Irina Sukha

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