In this work, two polymer materials have been tested in a lubricated reciprocating pin-on-plate contact geometry using water-based hydraulic fluids to simulate sliding conditions of seal materials used in offshore equipment. The effect of load, speed, water content of the lubricant, and soaking of the ultra-high molecular weight polyethylene (UHMWPE) and a polyketone (PK) sliding against a super-duplex stainless steel (SDSS) was studied. The results showed that for UHMWPE, an increase in normal force leads to a decrease in coefficient of friction for all velocities. While under the same sliding conditions, no relevant influence of load on friction coefficient was found for PK. On the other hand, an increase in sliding speed decreased the coefficient of friction for both materials. The effect of the water content of the hydraulic fluid on the tribological performance was also studied. In UHMWPE-SDSS system, increasing water content in the hydraulic fluid resulted in steady growth of the transfer film. One reason for this might be the decreasing lubricant viscosity, which moves the system toward the boundary lubrication regime. In addition, it was found that the incubation of both UHMWPE and PK in water-based lubricants showed a beneficial effect on friction and wear, which was explained by the change in polymer visco-elastic behavior.

References

References
1.
Von der Ohe
,
C. B.
,
Johnsen
,
R.
, and
Espallargas
,
N.
,
2010
, “
Modeling the Multi-Degradation Mechanisms of Combined Tribocorrosion Interacting With Static and Cyclic Loaded Surfaces of Passive Metals Exposed to Seawater
,”
Wear
,
269
(
7–8
), pp.
607
616
.
2.
Bahadur
,
S.
,
2000
, “
The Development of Transfer Layers and Their Role in Polymer Tribology
,”
Wear
,
245
(
1–2
), pp.
92
99
.
3.
Kahyaoglu
,
O. K.
, and
Unal
,
H.
,
2012
, “
Friction and Wear Behaviours of Medical Grade UHMWPE at Dry and Lubricated Conditions
,”
Int. J. Phys. Sci.
,
7
(
16
), pp.
2478
2485
.http://www.academicjournals.org/article/article1380548894_Kahyaoglu%20and%20Unal.pdf
4.
McKellop
,
H.
,
Clarke
,
I. C.
,
Markolf
,
K. L.
, and
Amstutz
,
H. C.
,
1978
, “
Wear Characteristics of UHMW Polyethylene: A Method for Accurately Measuring Extremely Low Wear Rates
,”
J. Biomed. Mater. Res.
,
12
(
6
), pp.
895
927
.
5.
Unal
,
H.
,
Sen
,
U.
, and
Mimaroglu
,
A.
,
2004
, “
Dry Sliding Wear Characteristics of Some Industrial Polymers against Steel Counterface
,”
Tribol. Int.
,
37
(
9
), pp.
727
732
.
6.
Bin Jia
,
B.
,
Li
,
T. S.
,
Liu
,
X. J.
, and
Cong
,
P. H.
,
2007
, “
Tribological Behaviors of Several Polymer-Polymer Sliding Combinations Under Dry Friction and Oil-Lubricated Conditions
,”
Wear
,
262
(
11–12
), pp.
1353
1359
.
7.
Clarke
,
C. G.
, and
Allen
,
C.
,
1991
, “
The Water Lubricated, Sliding Wear Behavior of Polymeric Materials Against Steel
,”
Tribol. Int.
,
24
(
2
), pp.
109
118
.
8.
Saikko
,
V.
,
2006
, “
Effect of Contact Pressure on Wear and Friction of Ultra-High Molecular Weight Polyethylene in Multidirectional Sliding
,”
Proc. Inst. Mech. Eng.
,
220
(
7
), pp.
723
731
.
9.
Hutchings
,
I. M.
, and
Shipway
,
P.
,
2017
, “
Friction
,”
Tribology: Friction and Wear of Engineering Materials
,
Butterworth-Heinemann
, Oxford, UK, pp.
37
75
.
10.
Abdelbary
,
A.
,
2014
, “
Polymer Tribology
,”
Wear of Polymers and Composites
,
Woodhead Publishing
,
Oxford, UK
, pp.
1
36
.
11.
Bahdur
,
S.
, and
Schwartz
,
C. J.
,
2008
, “
The Influence of Nanoparticle Fillers in Polymer Matrices on the Formation and Stability of Transfer Film During Wear
,”
Tribology of Polymeric Nanocomposites: Friction and Wear of Bulk Materials and Coatings
,
Butterworth-Heinemann
,
Amsterdam, The Netherlands
, pp.
17
34
.
12.
Wieleba
,
W.
,
2007
, “
The Mechanism of Tribological Wear of Thermoplastic Materials
,”
Arch. Civ. Mech. Eng.
,
7
(
4
), pp.
185
199
.
13.
Moore
,
D. F.
,
1975
, “
Wear and Abrasion
,”
Principles and Applications of Tribology
,
Pergamon Press
, Dublin, Ireland, pp.
177
202
.
You do not currently have access to this content.