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Corrosion behavior of HVAF- and HVOF-sprayed high-chromium Fe-based coatings
National School of Engineers, University of Limoges, Limoges, 87280, France.
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avd för tillverkningsprocesser. (PTW)ORCID-id: 0000-0002-7663-9631
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avd för tillverkningsprocesser. (PTW)ORCID-id: 0000-0002-6929-3310
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avd för tillverkningsprocesser. (PTW)ORCID-id: 0000-0002-9578-4076
Vise andre og tillknytning
2015 (engelsk)Konferansepaper, Poster (with or without abstract) (Fagfellevurdert)
Abstract [en]

Fe-based coatings with three particular elemental compositions and two different powder particle size were prepared by high-velocity air fuel (HVAF) and high-velocity oxy fuel (HVOF) techniques. The corrosion behavior of which were comparatively studied in 3.5 wt.% NaCl solution. The results indicated that the coatings produced by HVAF process exhibited denser structure with lower porosity. Polarization and electrochemical impedance spectroscopy (EIS) tests indicated that the HVAF coatings provided better corrosion resistance than the HVOF coatings. The presence of defects was significant in HVOF coatings. The investigation illustrated that the corrosion paths initiated and grow through defects of the coating. Furthermore, adding Cr strongly improved the corrosion resistance of the coatings. The results confirmed that the cheap HVAF process could be a potential alternative to HVOF to fabricate Fe-based coatings for industrial applications.

sted, utgiver, år, opplag, sider
2015.
Emneord [en]
Fe-based coatings, corrosion
HSV kategori
Forskningsprogram
Produktionsteknik
Identifikatorer
URN: urn:nbn:se:hv:diva-8898OAI: oai:DiVA.org:hv-8898DiVA, id: diva2:894987
Konferanse
7th Rencontres Internationales sur la Projection Thermique, 9th to 11th December 2015 – Limoges, France
Tilgjengelig fra: 2016-01-18 Laget: 2016-01-18 Sist oppdatert: 2018-08-12bibliografisk kontrollert

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