High-Velocity Oxyfuel Cr3C2-NiCr Replacing Hard Chromium Coatings
| Autor: | Nuria Espallargas, JOSEP MARIA GUILEMANY, Sergi Dosta, Assis Vicente Benedetti, Javier Fernandez, Patricia Hatsue Suegama |
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| Rok vydání: | 2005 |
| Předmět: |
Materials science
Scanning electron microscope Metallurgy Tribology Condensed Matter Physics Surfaces Coatings and Films Corrosion law.invention chemistry.chemical_compound Natural rubber Optical microscope chemistry law visual_art Materials Chemistry visual_art.visual_art_medium Nichrome Thermal spraying Chromium carbide |
| Zdroj: | Journal of Thermal Spray Technology. 14:335-341 |
| ISSN: | 1059-9630 |
| DOI: | 10.1361/105996305x59350 |
| Popis: | Comparative wear and corrosion properties of Cr3C2-NiCr (CC-TS) (a high-velocity oxyfuel [HVOF]) and hard chromium (HC) coatings obtained on a steel substrate have been studied. The structural characterization was done before and after measurements by optical microscopy, scanning electron microscopy, and scanning white light interferometry. Wear and corrosion properties were evaluated by ball on disk (ASTM G99-90), rubber wheel (ASTM G65-91), and electrochemical measurements of open circuit and polarization curves. The best corrosion and wear resistance was for the CC-TS obtained by HVOF. The open-circuit potential values measured for both samples after 18 h of immersion were: −0.240 and −0.550 V, respectively, for CC-TS and HC, versus Ag/AgCl,KClsat. Three orders of magnitude lower volume loss were found for CC-TS (HVOF) after friction tests compared with HC. |
| Databáze: | OpenAIRE |
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