Electroless of Ni–Mo–P/CNTs Composite Coatings on AZ91D Magnesium Alloy: Corrosion and Wear Resistance

Xiao, Yan; Sun, Wan‐chang; Jia, Ya-peng; Liu, Yu-Wan; Tian, Shasha

doi:10.1007/s12666-021-02427-y

Cited by 5 publications

(3 citation statements)

References 32 publications

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“…The obtained COF value is much lower than COF of previous researches (0.2 and 0.35) related to Mo coatings. 39,40 The minimum achievable COF (0.03) at the Mo concentration level of 32 g L 21 shows improved tribological behavior of the developed surface. 4.…”

Section: Corrosion and Tribological Analysismentioning

confidence: 96%

“…Different researchers have reported similar observations on different materials. 32,33 The uniform distribution of Mo layer in Figure 5(c) and (d) suggests that the higher availability of Mo nano-powder activates the pre-existing autocatalytic reaction, which in turn generates AlCrNi2, Mo3Ni0.24Si0.67, Ni3Si, and Cr0.8Ni0.2 phases, which are responsible for increasing the tribo-mechanical and corrosion properties of the coating surfaces.…”

Section: Analysis Of Surface Morphologymentioning

confidence: 99%

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Ni-Mo-P coatings on thrust plate of a gear pump to enhance its mechanical, tribological, and corrosion resistance properties

Sharma

Kumar

Das

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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Thrust plate in an external gear pump is one of the most important element which aligns the rotating gears and prevents the leakage through lateral clearances between rotating and non-rotating surfaces. It acts as a sacrificing element and fails frequently under fluctuating load pressure condition. The present research aims at enhancing the relative mechanical and tribological properties of the sacrificial thrust plate through electroless Ni-Mo-P coatings. Molybdenum (Mo) concentration in the electroless bath were tested for their effects on surface morphology, hardness, phase formation, wear rate, and wettability. A hard and self-lubricating layer (Al, Ni, Si, and Mo phases) on the coated surface was indicated by the compositional analysis performed using EDS and XRD. Results show that the microhardness of the coated surfaces has increased significantly by 149.5% (maximum hardness ~ 183.45 HV0.2) for 32 g L−1 Mo concentration. With 32 g L−1 Mo, the maximum coating thickness and water contact angle were 58 µm and 111°, respectively. The base material’s coefficient of friction was 0.5, whereas it was 0.25, 0.10, 0.06, and 0.03 for the samples made with 8, 16, 24, and 32 g L−1 Mo concentration, respectively. Compared to the uncoated sample, the maximum decrement in corrosion rate was found to be about six to seven times in the coated sample (with 32 g L−1 Mo). As a result, the developed coating surfaces provide hardness, lubricity, hydrophobicity, corrosion, and wear resistance simultaneously. The methodology of surface treatment can be used to modify the surface of critical hydraulic components having significant wear like in case of hydraulic cylinders.

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Section: Corrosion and Tribological Analysismentioning

confidence: 96%

Section: Analysis Of Surface Morphologymentioning

confidence: 99%

Ni-Mo-P coatings on thrust plate of a gear pump to enhance its mechanical, tribological, and corrosion resistance properties

Sharma

Kumar

Das

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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show abstract

“…EL-Ni-P coatings find their applications in the coating of corrosion-resistant components used in extreme environmental conditions in place of sacrificial layers [ 14 , 15 , 16 ]. In the past, several reports have dealt with the tribo-mechanical and corrosive behavior of Ni-P coatings by the EL method [ 17 ]. Recently, the distribution of P and a surface morphological study of the coated surface have been addressed in detail [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Electroless Ni-P-MoS2-Al2O3 Composite Coating with Hard and Self-Lubricating Properties

et al. 2022

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The work aimed to produce Ni-P-MoS2-Al2O3 on Al-7075 alloys with multiple attributes through an electroless (EL) plating route. The effects of additives (MoS2 and Al2O3) in the EL bath on the surface morphology, topography, hardness, composition (phase and elemental), roughness, wettability, and coating thickness were evaluated. Results indicate a substantial enhancement in microhardness of the EL-coated surfaces by 70% (maximum hardness = ~316 HV) using powders, and 30% (244 HV) without powders. The maximum coating thickness and water contact angle obtained with powders were 6.16 μm and 100.46°, respectively. The coefficient of friction for the samples prepared using powders was 0.12, and for the base material it was 0.18. The compositional analysis through EDS and XRD suggested the incorporation of a hard and lubricious layer on the EL-coated surface owing to the presence of different phases of Al, Mo, P, Zn, O, and S. Therefore, the resulting coating surfaces impart hardness, self-lubrication, hydrophobicity, and wear resistance simultaneously.

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Salt Water Corrosion Behaviour of Composite Coated Al-6061 Developed Through HVOF

Srinath¹,

Nagendra²,

Ravikumar³

et al. 2023

J. Inst. Eng. India Ser. C

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Electroless of Ni–Mo–P/CNTs Composite Coatings on AZ91D Magnesium Alloy: Corrosion and Wear Resistance

Cited by 5 publications

References 32 publications

Ni-Mo-P coatings on thrust plate of a gear pump to enhance its mechanical, tribological, and corrosion resistance properties

Ni-Mo-P coatings on thrust plate of a gear pump to enhance its mechanical, tribological, and corrosion resistance properties

Electroless Ni-P-MoS2-Al2O3 Composite Coating with Hard and Self-Lubricating Properties

Salt Water Corrosion Behaviour of Composite Coated Al-6061 Developed Through HVOF

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