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https://hdl.handle.net/10316/105867
Title: | Electroless Deposition of Ni-P Coatings on HNBR for Low Friction Rubber Seals | Authors: | Vasconcelos, Beatriz Serra, Ricardo Oliveira, João Fonseca, Carlos |
Keywords: | electroless plating; Ni-P; surface functionalization; rubber coating; antifriction | Issue Date: | 2020 | Publisher: | MDPI | Project: | Grant No. PT/BD/128477/2017 UIDB/00285/2020 HardRings (AAC n. 02/SAICT/2017, project No. 29122) |
Serial title, monograph or event: | Coatings | Volume: | 10 | Issue: | 12 | Abstract: | This paper reports a simple and cost-e ective procedure to coat hydrogenated nitrile butadiene rubber (HNBR) with a well-adherent Ni-P film by using the electroless plating method. A HNBR surface functionalization process was first optimized, creating an interpenetrating network with polyvinylpyrrolidone (PVP). Silver nanoparticles were deposited on PVP and acted as catalysts for the Ni-P film deposition, eliminating the expensive tin-palladium sensitization/activation step. A homogeneous, low phosphorous Ni-P film was obtained after 60–120 min of plating in an alkaline bath, with an average thickness of 3 to 10 m, respectively. The PVP internetwork played an important role on the strong adhesion of the film, 1.0 0.5 MPa. The tribological behavior of Ni-P-plated HNBR samples was studied for 1, 5 and 10 N applied loads under dry sliding on a pin-on-disc configuration and the coe cient of friction (CoF) was reduced by ~30–49%, compared to uncoated HNBR (loads 1–5N). Based on these results, Ni-P-coated rubber can be regarded as a novel solution for enhancement of the tribological behavior of dynamic seals; it can be regarded as a means to avoid machinery failure. This method o ers an alternative to the diamond-like carbon (DLC) coatings. | URI: | https://hdl.handle.net/10316/105867 | ISSN: | 2079-6412 | DOI: | 10.3390/coatings10121237 | Rights: | openAccess |
Appears in Collections: | I&D CEMMPRE - Artigos em Revistas Internacionais |
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Electroless-deposition-of-NiP-coatings-on-HNBR-for-low-friction-rubber-sealsCoatings.pdf | 6.89 MB | Adobe PDF | View/Open |
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