Tribocorrosion behaviour of thermally sprayed cermet coatings in paper machine environment

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Abstract

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.

Original languageEnglish
Article number106006
JournalTribology International
Volume142
Early online date9 Oct 2019
DOIs
Publication statusE-pub ahead of print - 9 Oct 2019
MoE publication typeA1 Journal article-refereed

Fingerprint

Cermet Cements
sprayed coatings
Sprayed coatings
Wear of materials
Corrosion
Coatings
corrosion
Abrasion
Electrolytes
Sulfates
coatings
Chlorides
tribometers
Porosity
abrasives
Degradation
sulfates
chlorides
electrolytes
degradation

Keywords

  • Abrasive wear
  • Cermet
  • Thermally sprayed coating
  • Tribocorrosion

Cite this

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title = "Tribocorrosion behaviour of thermally sprayed cermet coatings in paper machine environment",
abstract = "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.",
keywords = "Abrasive wear, Cermet, Thermally sprayed coating, Tribocorrosion",
author = "E. Huttunen-Saarivirta and V. Heino and E. Isotahdon and L. Kilpi and H. Ronkainen",
year = "2019",
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doi = "10.1016/j.triboint.2019.106006",
language = "English",
volume = "142",
journal = "Tribology International",
issn = "0301-679X",
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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.

PY - 2019/10/9

Y1 - 2019/10/9

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

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DO - 10.1016/j.triboint.2019.106006

M3 - Article

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VL - 142

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JF - Tribology International

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