| DOI | Trouver le DOI : https://doi.org/10.1115/GT2013-94024 |
|---|
| Auteur | Rechercher : Cai, F.; Rechercher : Huang, X.; Rechercher : Yang, Q.1 |
|---|
| Affiliation | - Conseil national de recherches du Canada. Aérospatiale
|
|---|
| Format | Texte, Article |
|---|
| Conférence | ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013, 3 June 2013 through 7 June 2013, San Antonio, Tx |
|---|
| Sujet | Coating microstructures; Coating-substrate systems; Diffusion layer thickness; Effective diffusion coefficients; EIS; Electrochemical behaviour; NaCl aqueous solution; PVD coatings; Corrosion; Corrosion resistance; Defects; Diffusion; Diffusion coatings; Electrochemical impedance spectroscopy; Exhibitions; Gas turbines; Hard coatings; Pitting; Potentiodynamic polarization; Titanium nitride; Electrochemical corrosion |
|---|
| Résumé | Hard coatings applied to steel components prevent corrosion attacks while at the same time mitigate erosion attack. However, the presence of process related through-coating defects such as pin holes, voids and growth defects, provides accesses for corrosive media to metal substrates, initializing pitting corrosion and eventually resulting in coating failure. This research studies the corrosion behavior of PVD TiN and CrN (CrSiCN) coated steels in 3.5 wt. % NaCl aqueous solution using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The results revealed that in a coating-substrate system, effective diffusion coefficient and diffusion layer thickness control the corrosion resistance; both factors are found to be related to coating microstructure. A denser and thicker coating structure are shown to have lower effective diffusion coefficients and greater effective diffusion layer thicknesses and consequently provided a high resistance to electrochemical corrosion. Copyright © 2013 by ASME. |
|---|
| Date de publication | 2013 |
|---|
| Dans | |
|---|
| Langue | anglais |
|---|
| Publications évaluées par des pairs | Oui |
|---|
| Numéro NPARC | 21270934 |
|---|
| Exporter la notice | Exporter en format RIS |
|---|
| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
|---|
| Identificateur de l’enregistrement | 09dc585a-56a1-46ca-bfe0-2dfe571b7da1 |
|---|
| Enregistrement créé | 2014-02-18 |
|---|
| Enregistrement modifié | 2020-04-22 |
|---|
