Preparation and characterization of the electrodeposited Cr–Al2O3/SiC composite coating

Gao, Jifeng; Suo, Jinping

doi:10.1016/j.apsusc.2011.06.090

Cited by 24 publications

(9 citation statements)

References 25 publications

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“…The incorporation of particles into electrodeposited metal coatings generally results in the improvement of the corrosion resistance of the coatings [3]. This effect is reported in many of the papers where ultrasound is used prior to the electrodeposition stage in order to achieve a better dispersion of particles in the plating electrolyte [50,55,60,65]. However few researchers have studied the effect that the use of ultrasound during the electrodeposition stage may have on the corrosion resistance of the resulting composite coatings as most studies are only focused on those composite coatings produced under the presence of ultrasound that exhibited the best surface finish and quality [45,47].…”

Section: Effect Of Ultrasound On the Corrosion Resistancementioning

confidence: 93%

Ultrasound-assisted electrodeposition of composite coatings with particles

Tudela

Zhang²,

Pal³

et al. 2014

Surface and Coatings Technology

111

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Section: Effect Of Ultrasound On the Corrosion Resistancementioning

confidence: 93%

Ultrasound-assisted electrodeposition of composite coatings with particles

Tudela

Zhang²,

Pal³

et al. 2014

Surface and Coatings Technology

111

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“…CrN coating manufactured by physical vapor deposition can effectively improve the tribological properties of piston rings (Liu et al , 1993). Cr-Al 2 O 3 composite coating consists of several layers of chromium, and each layer contains a network of micro-cracks filled with ceramic particles (Gao and Suo, 2011). These hard particles are embedded in the micro-cracks randomly, which form the load-bearing surface, and consequently, the Cr-Al 2 O 3 composite coating piston ring has excellent performance in wear resisting (Jang et al , 2009).…”

Section: Introductionmentioning

confidence: 99%

Tribological performance of three surface-modified piston rings matched with chromium-plated cylinder liner

Zhu

Han

et al. 2017

ILT

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Purpose The paper aims to investigate the friction and wear properties of three surface-modified piston rings matched with a chromium-plated cylinder liner. Design/methodology/approach Samples were taken from the chromium-plated cylinder liner, Cr-Al2O3 ring, CrN ring and Mo ring. Tribo-tests were conducted on a reciprocating sliding tribometer under fully formulated engine oils. Friction coefficients and wear depths of three friction pairs were tested. Surface morphologies of cylinder liners and piston rings before and after test were analyzed. Findings Experimental results show that in the Cr-Al2O3 piston ring, scuffing occurred easily when matched with the chromium-plated cylinder liner; compared with the Mo ring, the CrN ring could decrease the wear depth of the piston ring from 2.7 to 0.2 μm, and the wear depth of cylinder liner remained; however, the friction coefficient increased from 0.113 to 0.123. The tribological performances of three surface-modified piston rings were significantly different when they matched with chromium-plated cylinder liner. Originality/value Chromium-plated cylinder liner and the three kinds of surface-modified piston rings have excellent friction and wear properties, respectively. However, according to the systematic characteristics of internal combustion (IC) engine tribology, only the appropriate cylinder liner–piston ring can improve the tribological performance of the IC engine. This paper reports the tribological performance of three surface-modified piston rings matched with a chromium-plated cylinder liner. The results can be used as reference for the design of high-power-density diesel engine.

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“…11 The incorporation of SiC nanoparticles into the chromium metal matrix improved the wear and corrosion resistance of the coating by making the deposit pore and crack free. Also, WC, 12 Al 2 O 3 /SiC, 13 TiO 2 (ref. 14) nanoparticles have been co-deposited with Cr for enhancing the mechanical and electrochemical properties of the chromium coatings.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical behaviour of chromium–graphene composite coating

2016

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This work illustrates the role of graphene in enhancing the corrosion resistant property of chromium-graphene composite coating when compared to the corrosion resistant property of pure chromium coating containing ZnO nanoparticles. Chromium based coatings have been used extensively due to their various useful attributes such as corrosion and wear resistance and enhanced surface finish. In this work, Cr and Cr-graphene composite coatings were electrodeposited over mild steel substrate using Cr(III) plating bath. To deposit the coatings, electrodeposition method was also adopted due to its attributes such as low cost, less equipment intensive methodology, accuracy of reproduction and suitability for large scale surface modification. Three different coatings were produced: (a) Cr coating containing ZnO nanoparticles (C), (b) Cr coating containing ZnO nanoparticles deposited using formic acid (C F ) and (c) Cr coating containing ZnO nanoparticles and graphene deposited using formic acid (C FG ). Graphene used in the deposition process was produced from the electrochemical exfoliation of graphite in sodium lauryl sulphate (SLS) electroactive media. ZnO nanoparticles were synthesized using the precipitation method followed by calcination. Microstructural charaterization of the coatings revealed that the coating 'C' contained large cracks. Addition of formic acid (in the coating C F ) noticeably reduced the cracks in the coating which now also contained hillock structures. Addition of graphene (in coating C FG ) further enhanced the coating 2 morphology which now contained negligible cracks and increased hillock structures completely covering its surface. Diffraction analysis revealed that the addition of graphene also altered the texture of the chromium coatings. Potentiodynamic polarization and electrochemical impedance spectroscopic analysis revealed that the change in the morphology and microstructure of the deposit due to the addition of graphene substantially enhanced the corrosion resistance of the C FG coating when compared to both C and C F coatings.Hard chromium coatings are extensively applied due to attributes such as mechanical strength, 1 wear and corrosion resistance, 2 and ability to provide decorative appearance to tools and machineries etc. 3 Generally, chromium plating bath containing Cr(VI)/hexavalent chromium ions is used to deposit chromium. 4 Carcinogenicity and serious environmental problems posed by the hexavalent chromium ions has encouraged development of eco-friendly trivalent chromium/Cr(III) plating baths 5 for depositing chromium coatings. It was however observed that the chromium coatings produced from trivalent chromium bath contained cracks which deteriorated the ability of the coating towards protecting the degradation of the underlying substrate. 2,6 Cracks can be reduced by modifying the morphology of the deposit by altering the deposition parameters or using additives. 7 Danilov et al 8 and Surviliene et al 9 produced crack free chromium coating using trivalent chromium plating bat...

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Preparation and characterization of the electrodeposited Cr–Al2O3/SiC composite coating

Cited by 24 publications

References 25 publications

Ultrasound-assisted electrodeposition of composite coatings with particles

Ultrasound-assisted electrodeposition of composite coatings with particles

Tribological performance of three surface-modified piston rings matched with chromium-plated cylinder liner

Electrochemical behaviour of chromium–graphene composite coating

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