Contact Potential Difference as a Non-Destructive Testing of Steel

For steels of different grades, the effect of the chemical composition, structure, and surface etching on the contact potential difference is studied using the Kelvin probe method. It was shown experimentally that, with a change in the structure and chemical composition, the contact potential differ...

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Veröffentlicht in:	Solid state phenomena 2021-04, Vol.316, p.258-263
Hauptverfasser:	Aref'eva, L.P., Sukijazov, A.G., Dolgachev, Yu.V.
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Sprache:	eng
Schlagworte:	Chemical composition Composition effects Contact potentials Etching Nitric acid Nondestructive testing Work functions
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creator	Aref'eva, L.P. Sukijazov, A.G. Dolgachev, Yu.V.
description	For steels of different grades, the effect of the chemical composition, structure, and surface etching on the contact potential difference is studied using the Kelvin probe method. It was shown experimentally that, with a change in the structure and chemical composition, the contact potential difference changes. Etching the surface of the steel with a 4% solution of nitric acid leads to a sharp decrease in the magnitude of the contact potential difference, which allows us to conclude that the value of the electron work function from the sample surface increases. The ability to control the composition and structure of the material by the Kelvin probe method is shown.
doi_str_mv	10.4028/www.scientific.net/SSP.316.258
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subjects	Chemical composition Composition effects Contact potentials Etching Nitric acid Nondestructive testing Work functions
title	Contact Potential Difference as a Non-Destructive Testing of Steel
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