A Comparative Study of Erosion Wear Performance of Thermally Sprayed Ni-Based Composite Coatings

Singh, Amanpreet; Kumar, Hemant; Kumar, Satish

doi:10.1007/s11665-023-08041-x

Cited by 4 publications

(1 citation statement)

References 37 publications

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“…Several new research by Singh et al (2023aSingh et al ( , 2023bSingh et al ( , 2022) introduce coating additives such as Ni-based composite and WC-10Co4Cr to protect against erosion wear and improve the performance of composite panels in both offshore and onshore environmental conditions. The tribo-wear caused by the erosion could be prevented by thermally spraying solid coating on the equipment in harsh environment that is very similar extreme boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

Effects of Spectrum Loading and break in period using molybdenum disulphide (MoS₂) and zinc dialkyl dithiophosphate (ZDDP) as EP additives in lithium based grease

Nehme,

Nehme

2024

ILT

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Purpose The purpose of variable loading conditions (392 N-785N-392N-785N) with break-in period were used to study interactions between zinc dialkyl dithiophosphate (ZDDP) 0.1 P% (phosphorus) and fine-grade molybdenum disulfide (MoS2) 3%, in different mixtures of NLGI 2 lithium stearate grease. Four-ball wear tests were used to evaluate the tribological properties of different grease mixtures such as coefficient of friction and wear. ASTM 2266 as reported by earlier studies is useful, but it is not representative of real-life applications where variable loads and speeds and different break-in periods play a role and could change the results and the nature of tribofilms. Design/methodology/approach In this study, chemical and mechanical properties of tribofilms were examined. Moreover, design of experiment was used to examine the data and shorten experimentation time. Research described here is investigating variable loading conditions for real-life applications by using a break-in period of 2 min at the start to minimize asperities and establish a clean surface. Design expert (DOE) analyzes responses to reveal those variables that are single factor and those that are multifactor whether synergistically or antagonistically. Findings The results indicated that spectrum loading with break-in period showed reduction in wear when tested in greases with ZDDP/MoS2 combinations. Ramping up or down the load every 7.5 min for a rotational speed of 1,200 rpm and a total of 36,000 revolutions or 30-min time slowed the wear properties of lithium-based grease under different MoS2 and ZDDP concentrations. Experiments indicated that wear was largely dependent on the loading condition and ZDDP additives during specific break-in period at 1,200 rotational speed. It is believed that MoS2 greases perform better under spectrum loading and under constant loading when mixed with ZDDP phosphorus. Originality/value This research indicates that there is a synergistic interaction between ZDDP, MoS2 and variable loading especially when a break-in period is applied. The results indicated that wear was largely dependent on the specific speed used with spectrum loading as presented in the energy dispersive spectroscopy and the Auger electron spectroscopy analysis, and thus a 3% MoS2 grease with ZDDP (phosphorus: 0.1 Wt.%) are needed to improve the wear resistance and improve the friction characteristics. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-01-2024-0016/

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Section: Introductionmentioning

confidence: 99%

Effects of Spectrum Loading and break in period using molybdenum disulphide (MoS₂) and zinc dialkyl dithiophosphate (ZDDP) as EP additives in lithium based grease

Nehme,

Nehme

2024

ILT

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Tribo-performance analysis of HVOF sprayed Colmonoy-88 using the Taguchi method

Kumar,

Kumar

2024

Particulate Science and Technology

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Tribo-Erosion Analysis of HVOF Colmonoy-88-Coated Pump Impeller Steel in Coal Ash Particle Slurries

Singh,

Jain,

Gill

2024

Journal of Tribology

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Coal-ash slurries hold paramount importance in the service life of coal and mining industries, significantly impacting their operational efficiency and durability. The literature reveals that the prominent dominating parameters such as rotational speed, concentration, time duration and particle shape and size have a major impact on erosion wear. This research aims to explore the effects of coal ash slurries on Colmonoy-88 coated pump impeller steel, employing a combination of Design of Experiments (DOE) and Digital Image Analysis (DIA). Through slurry experiments, it is observed that erosion wear increases non-linearly with an increase in influencing parameters. The particle size emerges as the most significant factor, followed by concentration, speed, and time. Additionally, DIA is leveraged to validate the influence of various erodent particle sizes on the erosion wear of pump impeller steel. Results indicate that coal particles possess irregular shapes and sizes compared to fly ash and bottom ash, consequently resulting in larger erosion wear due to its lowest Circularity Factor (0.72). Furthermore, smaller particles exhibit lower erosion wear rates compared to larger ones. This study sheds light on the intricate dynamics of erosion wear in the context of coal ash slurries, offering insights crucial for the optimization of pump impeller steel durability in similar operational environments.

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A Comparative Study of Erosion Wear Performance of Thermally Sprayed Ni-Based Composite Coatings

Cited by 4 publications

References 37 publications

Effects of Spectrum Loading and break in period using molybdenum disulphide (MoS₂) and zinc dialkyl dithiophosphate (ZDDP) as EP additives in lithium based grease

Effects of Spectrum Loading and break in period using molybdenum disulphide (MoS₂) and zinc dialkyl dithiophosphate (ZDDP) as EP additives in lithium based grease

Tribo-performance analysis of HVOF sprayed Colmonoy-88 using the Taguchi method

Tribo-Erosion Analysis of HVOF Colmonoy-88-Coated Pump Impeller Steel in Coal Ash Particle Slurries

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A Comparative Study of Erosion Wear Performance of Thermally Sprayed Ni-Based Composite Coatings

Cited by 4 publications

References 37 publications

Effects of Spectrum Loading and break in period using molybdenum disulphide (MoS2) and zinc dialkyl dithiophosphate (ZDDP) as EP additives in lithium based grease

Effects of Spectrum Loading and break in period using molybdenum disulphide (MoS2) and zinc dialkyl dithiophosphate (ZDDP) as EP additives in lithium based grease

Tribo-performance analysis of HVOF sprayed Colmonoy-88 using the Taguchi method

Tribo-Erosion Analysis of HVOF Colmonoy-88-Coated Pump Impeller Steel in Coal Ash Particle Slurries

Contact Info

Product

Resources

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Effects of Spectrum Loading and break in period using molybdenum disulphide (MoS₂) and zinc dialkyl dithiophosphate (ZDDP) as EP additives in lithium based grease

Effects of Spectrum Loading and break in period using molybdenum disulphide (MoS₂) and zinc dialkyl dithiophosphate (ZDDP) as EP additives in lithium based grease