The paper exploits the possibility of extracting the geometric properties of a polymeric coating of periodic metal layers used in industrial products from non-contact microwave backscattering measurements. Specifically, a flexible pipe having a periodically corrugated metal profile coated with a thick Polivinylidenedifluoride (PVDF) layer, suitable for oil industry applications, has been considered. The combined use of magnitude and phase of the reflected signal, acquired on a wide relative frequency band (∼15%), allows calculating the dielectric filling level and the period of each corrugation with accuracy better than 1/100 of the period length, 21 mm in our case. The results of an experimental campaign, carried out to estimate the accuracy achievable in the operational environment, are also shown.

A microwave non-destructive testing method for controlling polymeric coating of metal layers in industrial products / Mazzinghi, A.; Freni, A.; Capineri, L.. - In: NDT & E INTERNATIONAL. - ISSN 0963-8695. - ELETTRONICO. - 102:(2019), pp. 207-217. [10.1016/j.ndteint.2018.12.003]

A microwave non-destructive testing method for controlling polymeric coating of metal layers in industrial products

Mazzinghi, A.
Investigation
;
Freni, A.
Investigation
;
Capineri, L.
Investigation
2019

Abstract

The paper exploits the possibility of extracting the geometric properties of a polymeric coating of periodic metal layers used in industrial products from non-contact microwave backscattering measurements. Specifically, a flexible pipe having a periodically corrugated metal profile coated with a thick Polivinylidenedifluoride (PVDF) layer, suitable for oil industry applications, has been considered. The combined use of magnitude and phase of the reflected signal, acquired on a wide relative frequency band (∼15%), allows calculating the dielectric filling level and the period of each corrugation with accuracy better than 1/100 of the period length, 21 mm in our case. The results of an experimental campaign, carried out to estimate the accuracy achievable in the operational environment, are also shown.
2019
102
207
217
Mazzinghi, A.; Freni, A.; Capineri, L.
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1146017
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