Self-lubricating Ni-P-MoS2 composite coatings

Tribological coatings with low coefficients of friction are in high demand by various industries since they can improve machine efficiency and have an environmental impact. A self-lubricating Ni-P-MoS2 composite coating has been successfully deposited on a mild steel substrate by electrodeposition....

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Bibliographic Details
Published in:Surface & coatings technology 2016-12, Vol.307, p.926-934
Main Authors: He, Y., Wang, S.C., Walsh, F.C., Chiu, Y.-L., Reed, P.A.S.
Format: Article
Language:English
Subjects:
Electrodeposition
MoS2
Ni-P
Self-lubrication
Tribofilm
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Summary:Tribological coatings with low coefficients of friction are in high demand by various industries since they can improve machine efficiency and have an environmental impact. A self-lubricating Ni-P-MoS2 composite coating has been successfully deposited on a mild steel substrate by electrodeposition. The effects of MoS2 on the tribological coatings have been investigated. Compared to a pure Ni-P coating, the Ni-P-MoS2 composite coating exhibited a dramatic reduction in friction coefficient against a bearing steel ball from 0.45 to 0.05. Examination and analysis of the worn surfaces and wear debris, the composite coating showed minimum wear and oxidation compared to the severe wear and oxidation observed in the pure Ni-P coating. The evolution of MoS2 particles in sliding wear has been elucidated. •Successfully electrodeposited a super lubricated Ni-P-MoS2 coating.•Composite coatings may extend the application of MoS2 to humid atmosphere.•MoS2 contents have a strong influence on friction.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2016.09.078