TY - JOUR
T1 - Tribocorrosion behaviour of thermally sprayed cermet coatings in paper machine environment
AU - Huttunen-Saarivirta, E.
AU - Heino, V.
AU - Isotahdon, E.
AU - Kilpi, L.
AU - Ronkainen, H.
N1 - Funding Information:
The financial support for the SUBTRIB project from the Finnish Funding Agency for Technology and Innovation (Business Finland; decision number 865/31/2016 ), participating companies and VTT Technical Research Centre of Finland Ltd is gratefully acknowledged. Mr. Simo Varjus is cordially thanked for conducting the pin-on-disc experiments. The assisting personnel at VTT, particularly Tuomo Kinnunen and Taru Lehtikuusi, is thanked for the help in the laboratory work.
Publisher Copyright:
© 2019 Elsevier Ltd
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2020/2
Y1 - 2020/2
N2 - Tribocorrosion behaviour of thermally sprayed cermet coatings: WC-CoCr deposited by HVOF and HVAF and Cr3C2-WC-NiCrCo applied by HVAF, was examined in paper machine environment in a pin-on-disc tribometer under the load of 20 N in electrolyte containing chlorides and sulphates, pH 4.5. Wear was the dominant degradation mechanism for all coatings, followed by corrosion-induced wear, the importance of which increased with rising potential. The overall material losses were lowest for HVAF WC-CoCr and highest for HVAF Cr3C2-WC-NiCrCo, the latter being related to the evident abrasive wear of the Cr3C2 phase and cracking along Cr3C2-matrix interface in the near-surface areas. Among the three coatings, contribution by corrosion to the damage was greatest in HVOF WC-CoCr, likely due to high degree of porosity.
AB - Tribocorrosion behaviour of thermally sprayed cermet coatings: WC-CoCr deposited by HVOF and HVAF and Cr3C2-WC-NiCrCo applied by HVAF, was examined in paper machine environment in a pin-on-disc tribometer under the load of 20 N in electrolyte containing chlorides and sulphates, pH 4.5. Wear was the dominant degradation mechanism for all coatings, followed by corrosion-induced wear, the importance of which increased with rising potential. The overall material losses were lowest for HVAF WC-CoCr and highest for HVAF Cr3C2-WC-NiCrCo, the latter being related to the evident abrasive wear of the Cr3C2 phase and cracking along Cr3C2-matrix interface in the near-surface areas. Among the three coatings, contribution by corrosion to the damage was greatest in HVOF WC-CoCr, likely due to high degree of porosity.
KW - Abrasive wear
KW - Cermet
KW - Thermally sprayed coating
KW - Tribocorrosion
UR - http://www.scopus.com/inward/record.url?scp=85073011895&partnerID=8YFLogxK
U2 - 10.1016/j.triboint.2019.106006
DO - 10.1016/j.triboint.2019.106006
M3 - Article
AN - SCOPUS:85073011895
VL - 142
JO - Tribology International
JF - Tribology International
SN - 0301-679X
M1 - 106006
ER -