Abstract
Calcium sulfonate complex greases have excellent extreme pressure, antiwear, and anticorrosion properties and are widely applied in rolling bearings, particularly in humid environments. In this article, the shear stability of dry and water-contaminated lubricating calcium sulfonate complex greases is described using a novel aging method. Unlike lithium and polyurea greases, no shear softening is observed for the dry greases due to the good mechanical stability of the particle-like thickener structure. For water-contaminated greases, no water separation was found during the prolonged aging. Instead, a homogeneous water–calcium sulfonate thickener micellar structure is generated. These micelles function as apparent thickeners and effectively increase the thickener concentration, which thickens the grease. This may explain why calcium sulfonate complex grease has excellent water absorption properties.
| Original language | English |
|---|---|
| Pages (from-to) | 626-634 |
| Number of pages | 9 |
| Journal | Tribology transactions |
| Volume | 62 |
| Issue number | 4 |
| Early online date | 30 Apr 2019 |
| DOIs | |
| Publication status | Published - 4 Jul 2019 |
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Keywords
- UT-Hybrid-D
- rheology
- water contamination
- Grease application
Cite this
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On the Shear Stability of Dry and Water-Contaminated Calcium Sulfonate Complex Lubricating Greases. / Zhou, Yuxin; Bosman, Rob; Lugt, Piet M.
In: Tribology transactions, Vol. 62, No. 4, 04.07.2019, p. 626-634.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - On the Shear Stability of Dry and Water-Contaminated Calcium Sulfonate Complex Lubricating Greases
AU - Zhou, Yuxin
AU - Bosman, Rob
AU - Lugt, Piet M.
N1 - Taylor & Francis deal
PY - 2019/7/4
Y1 - 2019/7/4
N2 - Calcium sulfonate complex greases have excellent extreme pressure, antiwear, and anticorrosion properties and are widely applied in rolling bearings, particularly in humid environments. In this article, the shear stability of dry and water-contaminated lubricating calcium sulfonate complex greases is described using a novel aging method. Unlike lithium and polyurea greases, no shear softening is observed for the dry greases due to the good mechanical stability of the particle-like thickener structure. For water-contaminated greases, no water separation was found during the prolonged aging. Instead, a homogeneous water–calcium sulfonate thickener micellar structure is generated. These micelles function as apparent thickeners and effectively increase the thickener concentration, which thickens the grease. This may explain why calcium sulfonate complex grease has excellent water absorption properties.
AB - Calcium sulfonate complex greases have excellent extreme pressure, antiwear, and anticorrosion properties and are widely applied in rolling bearings, particularly in humid environments. In this article, the shear stability of dry and water-contaminated lubricating calcium sulfonate complex greases is described using a novel aging method. Unlike lithium and polyurea greases, no shear softening is observed for the dry greases due to the good mechanical stability of the particle-like thickener structure. For water-contaminated greases, no water separation was found during the prolonged aging. Instead, a homogeneous water–calcium sulfonate thickener micellar structure is generated. These micelles function as apparent thickeners and effectively increase the thickener concentration, which thickens the grease. This may explain why calcium sulfonate complex grease has excellent water absorption properties.
KW - UT-Hybrid-D
KW - rheology
KW - water contamination
KW - Grease application
U2 - 10.1080/10402004.2019.1588445
DO - 10.1080/10402004.2019.1588445
M3 - Article
AN - SCOPUS:85065200233
VL - 62
SP - 626
EP - 634
JO - Tribology transactions
JF - Tribology transactions
SN - 1040-2004
IS - 4
ER -