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Wear and Corrosion Behavior of HVAF Sprayed WC-10Ni and WC-20Cr3C2-6Ni Coatings

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Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoSurface Modification Technologies XXVIII
AlaotsikkoProceedings of the Twenty Eighth International Conference on Surface Modification Technologies
ToimittajatT.S. Sudarshan, Petri Vuoristo, Heli Koivuluoto
KustantajaValardocs
Sivut55-65
Vuosikerta28
ISBN (painettu)978-81-926196-1-3
TilaJulkaistu - tammikuuta 2015
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaInternational Conference on Surface Modification Technologies - , Suomi
Kesto: 1 tammikuuta 2000 → …

Conference

ConferenceInternational Conference on Surface Modification Technologies
MaaSuomi
Ajanjakso1/01/00 → …

Tiivistelmä

WC-10Ni and WC-20Cr3C2-6Ni coatings deposited by High Velocity Air-Fuel (HVAF) spraying were studied and compared in the present paper. A series of tribological tests and electrochemical measurements were carried out in order to examine the effect of coating composition on the abrasion, sliding wear and corrosion behavior. The experimental results revealed that the overall wear and corrosion resistance of the WC-10Ni coatings was superior to that of WC-20Cr3C2-6Ni due to denser microstructure, high hardness, and fewer microcracks which act in the coatings as infiltration path for the electrolyte. It was found out that the chemical composition, homogeneity and bonding between splats are important factors influencing the corrosion properties and impermeability of HVAF sprayed WC cermet based coatings in 3,5 wt.% NaCl solution.

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