Electrochemical behaviour of cermet coatings with a bond coat on Al7075: Pseudopassivity, localized corrosion and galvanic effect considerations in a saline environment
| dc.contributor.author | Lekatou, A. | en |
| dc.contributor.author | Zois, D. | en |
| dc.contributor.author | Karantzalis, A. E. | en |
| dc.contributor.author | Grimanelis, D. | en |
| dc.date.accessioned | 2015-11-24T17:33:48Z | |
| dc.date.available | 2015-11-24T17:33:48Z | |
| dc.identifier.issn | 0010-938X | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/13897 | |
| dc.rights | Default Licence | - |
| dc.subject | cermet coatings | en |
| dc.subject | bond coat | en |
| dc.subject | polarization | en |
| dc.subject | potentiostatic | en |
| dc.subject | raman spectroscopy | en |
| dc.subject | pseudopassivity | en |
| dc.subject | thermally sprayed coatings | en |
| dc.subject | velocity oxygen-fuel | en |
| dc.subject | cobalt oxide-films | en |
| dc.subject | tungsten-carbide | en |
| dc.subject | cemented carbides | en |
| dc.subject | carbon nanotubes | en |
| dc.subject | residual-stress | en |
| dc.subject | aluminum-alloy | en |
| dc.subject | hard chromium | en |
| dc.subject | stainless-steels | en |
| dc.title | Electrochemical behaviour of cermet coatings with a bond coat on Al7075: Pseudopassivity, localized corrosion and galvanic effect considerations in a saline environment | en |
| heal.abstract | The behaviour of an HVOF WC-17Co/Ni-5Al coating on Al7075 in aqueous NaCl is investigated. The coating susceptibility to localized corrosion depended on the potential of polarization reversal. A two-stage pseudopassivity was observed for WC-17Co: At low overpotentials, oxidation occurred in the binder leading to surface films composed of anhydrous Co- and W-oxides. At high overpotentials, oxidation extended to the carbide phase leading to the formation of hydrated WO(3) films. Ni-5Al notably reduced the galvanic effect between WC-17Co and Al7075, whereas it hindered corrosion propagation into the substrate. The coating showed a high corrosion resistance during salt spraying for 49 days. (C) 2010 Elsevier Ltd. All rights reserved. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | DOI 10.1016/j.corsci.2010.04.010 | - |
| heal.identifier.secondary | <Go to ISI>://000279094800011 | - |
| heal.journalName | Corrosion Science | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2010 | - |
| heal.publisher | Pergamon - Elsevier | en |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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