Electrochemical polarisation and impedance spectroscopy tests in0.1 M HCl and 0.1 M H2SO4 solutions were performed on HVOF-sprayedcermet coatings (WC–17% Co, WC–10% Co–4% Cr) and AtmosphericPlasma-Sprayed (APS) ceramics (Al2O3, Al2O3–13 wt%TiO2, Cr2O3) with APSbond coat (Ni–Co–Cr–Al–Y). Reference tests were also performed on hardchrome electroplating. Plasma-sprayed coatings offer limited substrateprotection owing to interconnected porosity, although the bond coat promotessome forms of passivation in H2SO4. HVOF-sprayed cermets possess goodcorrosion resistance in both environments. Chrome electroplating showscomparatively better corrosion resistance in H2SO4, but worse in HCl.

Electrochemical comparison between corrosion resistance of some thermally sprayed coatings / Bolelli, Giovanni; Cannillo, Valeria; Giovanardi, Roberto; Lusvarghi, Luca. - In: INTERNATIONAL JOURNAL OF SURFACE SCIENCE AND ENGINEERING. - ISSN 1749-7868. - STAMPA. - 2:3-4(2008), pp. 222-239. [10.1504/IJSURFSE.2008.020495]

Electrochemical comparison between corrosion resistance of some thermally sprayed coatings

BOLELLI, Giovanni;CANNILLO, Valeria;GIOVANARDI, Roberto;LUSVARGHI, Luca
2008

Abstract

Electrochemical polarisation and impedance spectroscopy tests in0.1 M HCl and 0.1 M H2SO4 solutions were performed on HVOF-sprayedcermet coatings (WC–17% Co, WC–10% Co–4% Cr) and AtmosphericPlasma-Sprayed (APS) ceramics (Al2O3, Al2O3–13 wt%TiO2, Cr2O3) with APSbond coat (Ni–Co–Cr–Al–Y). Reference tests were also performed on hardchrome electroplating. Plasma-sprayed coatings offer limited substrateprotection owing to interconnected porosity, although the bond coat promotessome forms of passivation in H2SO4. HVOF-sprayed cermets possess goodcorrosion resistance in both environments. Chrome electroplating showscomparatively better corrosion resistance in H2SO4, but worse in HCl.
2008
2
3-4
222
239
Electrochemical comparison between corrosion resistance of some thermally sprayed coatings / Bolelli, Giovanni; Cannillo, Valeria; Giovanardi, Roberto; Lusvarghi, Luca. - In: INTERNATIONAL JOURNAL OF SURFACE SCIENCE AND ENGINEERING. - ISSN 1749-7868. - STAMPA. - 2:3-4(2008), pp. 222-239. [10.1504/IJSURFSE.2008.020495]
Bolelli, Giovanni; Cannillo, Valeria; Giovanardi, Roberto; Lusvarghi, Luca
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/421624
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 7
  • ???jsp.display-item.citation.isi??? 7
social impact