Determining the sequence of elimination of impurity ions from the surface of historical cold iron weapons

Authors

DOI:

https://doi.org/10.15587/1729-4061.2023.283077

Keywords:

historical cold weapons, chemical composition, impurity ions, X-ray fluorescence analysis, identification, examination, authenticity

Abstract

Confirming the authenticity of historical cold weapons and determining their age is an urgent problem in practical examination. One of the promising directions for its solution is the experimental study of the process of elimination of impurity ions from iron, which occurs throughout the long history of life.

This paper describes a model that explains the sequence of elimination of impurity ions from near-surface parts of the metal. Deformation indicators of the crystal lattice of iron were calculated and sorted in order of decreasing ionic radius of the impurity chemical element. A diagram of the deformation effect of impurity chemical elements on the volume-centered crystal lattice of iron was constructed. Ions that are larger in diameter are more actively eliminated from the surface layers of the metal, while ions that are smaller are removed to a lesser extent.

With the help of the authors’ methodology, a study of the chemical composition of the surface of collection samples of iron cold weapons of the 20th, 19th, and 18th centuries was carried out. It has been established that a metal alloy made in the recent past ‒ up to 100 years ‒ is characterized by a very active release of impurity chemical elements on the surface when it is heated. Iron weapons made up to 200 years ago have a significantly lower ability to release chemical impurities because most of the latter have already been eliminated. At the same time, samples of cold weapons of this age already have microdefects in the form of cleavage cracks and caverns, so their surface contains a significant number of compounds of eliminated chemical elements that have accumulated during the long history of their use. Older cold weapons, made 300 years ago or earlier, have impurity ions that are smaller than ferric ions, particularly silicon.

The results of the research are important for the identification and authentication of historical iron cold weapons

Author Biographies

Yuliia Vovk, State University of Trade and Economics

Postgraduate Student

Department of Commodity Science and Customs Affairs

Volodymyr Indutnyi, State University of Trade and Economics

Doctor of Geological and Mineralogical Sciences, Associate Professor

Department of Commodity Science and Customs Affairs

Nina Merezhko, State University of Trade and Economics

Doctor of Technical Sciences, Professor, Head of Department

Department of Commodity Science and Customs Affairs

Kateryna Pirkovich, State University of Trade and Economics

PhD, Associate Professor

Department of Commodity Science and Customs Affairs

Valeriia Dyshlova, Laboratory for Expertise and Researches of the State Customs Service of Ukraine

Deputy Head of Commodity Research, Head of Engineering and Forensic Expertise Unit

Department of Engineering, Technical and Forensic Expertise of the Department of Commodity, Engineering, Technical and Forensic Expertise

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Determining the sequence of elimination of impurity ions from the surface of historical cold iron weapons

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Published

2023-06-30

How to Cite

Vovk, Y., Indutnyi, V., Merezhko, N., Pirkovich, K., & Dyshlova, V. (2023). Determining the sequence of elimination of impurity ions from the surface of historical cold iron weapons. Eastern-European Journal of Enterprise Technologies, 3(12 (123), 24–29. https://doi.org/10.15587/1729-4061.2023.283077

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Section

Materials Science