Friction and Wear Behavior of Ultra-High Molecular Weight Polyethylene Sliding Against GCr15 Steel and Electroless Ni–P Alloy Coating Under the Lubrication of Seawater |
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Authors: | Jianzhang Wang Fengyuan Yan Qunji Xue |
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Affiliation: | (1) State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People’s Republic of China;(2) Graduate School, Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China |
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Abstract: | The friction and wear behavior of ultra-high molecular weight polyethylene (UHMWPE) sliding against GCr15 steel and electroless
Ni-P alloy coating under the lubrication of seawater was investigated and compared with that under dry sliding and lubrication
of pure water and 3.5 wt.% NaCl solution, respectively. It was found that under the lubrication of aqueous medium, the friction
and wear behavior of UHMWPE mainly depended on the corrosion of counterface and the lubricating effect of the medium. Because
of serious corrosion of counterface by the medium, the wear rates of UHMWPE sliding against GCr15 under the lubrication of
seawater and NaCl solution were much larger than that under other conditions, and such a kind of wear closely related to the
corrosion of counterface can be reckoned as indirect corrosive wear. However, when sliding against corrosion-resistant Ni–P
alloy under the lubrication of seawater, the lowest coefficient of friction and wear rate of UHMWPE were obtained, owing to
superior lubricating effect of seawater. Moreover, periodic ripple patterns were observed on the worn surfaces of UHMWPE sliding
against GCr15 under the lubrication of seawater and NaCl solution, which were ascribed to the intelligent reconstruction of
surface microstructure of UHMWPE upon large plowing effect of the counterface asperities. Based on scanning electron microscopic
(SEM) and three-dimensional (3D) profile analyses of the worn surfaces of UHMWPE, a stick–slip dynamic mechanism was proposed
to illustrate the pattern abrasion of UHMWPE.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. |
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Keywords: | UHMWPE Seawater lubrication Indirect corrosive wear Stick– slip Pattern abrasion |
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