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Magnetodynamic testing of the thickness of nickel coatings applied under chromium coatings on two-layer (nonferromagnet-ferromagnet) bases

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Abstract

The possibility of testing the thicknesses of nickel coatings under chromium coatings on two-layer (nonferromagnetic-ferromagnetic) bases by the magnetodynamic method has been substantiated theoretically and experimentally. The technique and an instrument have been developed; they provide the inspection of nickel coatings of the combustors of liquid-propellant engines that are up to 700 μm thick and under chromium coatings that are up to 150 μm thick, with an error of up to ±10% regardless of the thickness of the coating; such an error is due to the chromium effect, the structural state of the nickel, and the magnetization of the combustor body.

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References

  1. Lukhvich, A.A., Bulatov, O.V., and Luk’yanov, A.L., Testing Thick Nickel Coatings Applied on Two-Layer (Nonferromagnet-Ferromagnet) Bases by Magnetodynamic Thickness Gauges, Rus. J. Nondestr. Test., 2014, vol. 50, no. 4, pp. 187–194.

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  2. Lukhvich, A.A. and Bulatov, O.V., Possibilities of the Magnetodynamic Method for Testing the Thickness of Two-Layer Coatings, Rus. J. Nondestr. Test., 2008, vol. 44, no. 10, pp. 676–682.

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  3. Lukhvich, A.A., Bulatov, O.V., and Luk’yanov, A.L., Possibilities of the Magnetodynamic Method for Testing the Thickness of Coatings with Nonuniform Properties (Experiment), Rus. J. Nondestr. Test., 2009, vol. 45, no. 11, pp. 779–785.

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Authors and Affiliations

  1. Institute of Applied Physics, National Academy of Sciences of Belarus, Akademicheskaya ul. 16, Minsk, 270072, Belarus

    A. A. Lukhvich, O. V. Bulatov, A. L. Luk’yanov, M. N. Polyakova & V. V. Mosyakin

Authors
  1. A. A. Lukhvich
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  2. O. V. Bulatov
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  3. A. L. Luk’yanov
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  4. M. N. Polyakova
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  5. V. V. Mosyakin
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Correspondence to A. A. Lukhvich.

Additional information

Original Russian Text © A.A. Lukhvich, O.V. Bulatov, A.L. Luk’yanov, M.N. Polyakova, V.V. Mosyakin, 2015, published in Defektoskopiya, 2015, Vol. 51, No. 1, pp. 3–10.

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Lukhvich, A.A., Bulatov, O.V., Luk’yanov, A.L. et al. Magnetodynamic testing of the thickness of nickel coatings applied under chromium coatings on two-layer (nonferromagnet-ferromagnet) bases. Russ J Nondestruct Test 51, 1–7 (2015). https://doi.org/10.1134/S1061830915010040

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  • DOI: https://doi.org/10.1134/S1061830915010040

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