Preparation of a Ni-P-nanoPTFE Composite Coating on the Surface of GCr15 Steel for Spinning Rings via a Defoamer and Transition Layer and Its Wear and Corrosion Resistance

Shunqi, Mei; Zhou, Cong; Hu, Zhi Yi; Xing, Zhi; Zheng, Qiang; Chai, Xuhui

doi:10.3390/ma16124427

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…The addition of 1 wt% defoamer to the coating can increase the impact strength from 30 kg•cm to 40 kg•cm after modification (Table 3). The effect of defoamer on improving the mechanical properties of the coating is consistent with that reported in the related literature [25]. Figure 7 shows the WCAs of the coatings with varying amounts of defoamer.…”

Section: Effect Of Defoamer On Coating Performancesupporting

confidence: 88%

The Effect of Coating Additives on the Properties of Hydrophobic Coatings with Low Infrared Emissivity

Zhang

2023

Coatings

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In order to further reduce the emissivity of hydrophobic low infrared emissivity composite coating and improve its mechanical properties, a dispersant, adhesion enhancer, and defoamer were used to improve the dispersion state of the fillers, the interface structure, and the surface state of a hydrogen silicone oil-modified polyurethane/Al composite coating. The influences of dispersant, adhesion enhancer, and defoamer on the microstructure, emissivity, glossiness, hydrophobic property, adhesion strength, and impact strength of the coating were systematically studied. The results indicate that polycarboxylate anionic dispersant can improve the dispersion state of Al powder and nano-SiO2 in the coating, so that the infrared emissivity of the coating can be reduced, and the coating can have greater hydrophobic and mechanical properties. The bonding strength between the resin and the substrate of the coating can be improved by the adhesion enhancer through a bridging action, so that the mechanical properties of the coating can be significantly improved. The defoamer can significantly reduce the pores in the coating, resulting in a substantial improvement in the surface condition, and the mechanical properties can be significantly improved. The coating exhibits superior characteristics, including an emissivity value of 0.527, glossiness of 4.3, adhesion strength of grade 1, impact strength of 40 kg·cm, and hydrophobic property (the water contact angle (WCA) is 140°) when the amount of dispersant, adhesion enhancer, and defoamer is 5 wt%, 4 wt%, and 1 wt%, respectively.

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Section: Effect Of Defoamer On Coating Performancesupporting

confidence: 88%

The Effect of Coating Additives on the Properties of Hydrophobic Coatings with Low Infrared Emissivity

Zhang

2023

Coatings

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“…This material is also widely used as a base material for the production of composite materials [54][55][56]. However, a series of studies aimed at analyzing the influence of the percentages of the base and reinforcing elements on the final properties of the materials are necessary to produce high-quality composites.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, experiments are conducted to identify specific changes in the behavior of the composite at different concentrations of the PTFE base [54,56] and other materials [41]. PTFE is formed in different ways to obtain composites with different degrees of stiffness [55]. The authors [57] conduct studies aimed at analyzing the influence of the content of reinforcing materials on the wear rate and tribological characteristics when using two types of environmental lubricants (water and glycerin).…”

Section: Discussionmentioning

confidence: 99%

The Geometric Configuration of Lubricant Recesses of the Polymer Sliding Layer of the Bearing

Bogdanova,

Kamenskikh,

Nosov

2023

Designs

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Polymers have gained a foothold in the international market and are actively utilized at a large scale in various industries. They are used as sliding layers in various types of friction units. However, there is a lack of research on their deformation behavior under different design conditions. This work is focused on studying the influence of the geometrical design of lubrication recesses in a polymer sliding layer operating under conditions of frictional contact interaction. The article investigated an element of bridge-bearing steel plate with recesses for lubrication. Two geometrical configurations of recesses are studied: the annular groove and spherical well in the engineering software package ANSYS Mechanical APDL. Polytetrafluoroethylene (PTFE) is considered an elastic-plastic sliding layer. A comparative analysis of two models with different geometrical configurations of cutouts for lubrication, with/without taking into account its volume in the recess, has been conducted. The article establishes that in the absence of lubrication in the recesses, large deformations of the polymer sliding layer occur. This effect negatively affects the structure as a whole. Changing the geometry of the recess for lubrication has the greatest effect on the intensity of plastic deformations. Its maximum level is lowered by almost ~60% when spherical notches are used for lubrication instead of grooves. The friction coefficient of the polymer has a great influence on the contact tangential stress. At the experimental coefficient of friction, it is lowered on average by ~85%. The friction coefficient of the lubricant has almost no effect on the deformation of the cell (<1%).

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Effect of Coating Additives on Properties of Hydrophobic Coatings with Low Infrared Emissivity

Zhang¹,

Li²,

Lv³

2023

Preprint

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In order to further reduce the emissivity of the hydrophobic low infrared emissivity composite coating and improve the mechanical properties of the coating, the dispersant, adhesion enhancer, and defoamer were used to improve the dispersion state of the fillers, the interface structure, and the surface state of the hydrogen silicone oil modified polyurethane/Al composite coating. The effects of dispersant, adhesion enhancer, and defoamer on the micro-structure, emissivity, glossiness, hydrophobic property, and mechanical properties of the coating were systematically studied. The results show that the polycarboxylate anionic dispersant can obviously improve the dispersion state of flake Al powder and nano-SiO2 in the coating, so that the infrared emissivity of the coating can be reduced, and the coating can have higher hydrophobic and mechanical properties. The bonding strength between the resin matrix and the metal substrate of the coating can be significantly improved by the adhesion enhancer through the bridging action, so that the adhesion strength and impact strength of the coating can be significantly improved. The defoamer can significantly reduce the pores in the coating, so that the surface state of the coating can be significantly improved, and the mechanical properties of the coating can be significantly improved. The coating has the best emissivity (0.527), glossiness (4.3), adhesion strength (grade 1), impact strength (40 kg.cm), and hydrophobic property (water contact angle (WCA) is 140o) when the amount of dispersant, adhesion enhancer, and defoamer is 5 wt%, 4 wt%, and 1 wt%, respectively.

show abstract

Preparation of a Ni-P-nanoPTFE Composite Coating on the Surface of GCr15 Steel for Spinning Rings via a Defoamer and Transition Layer and Its Wear and Corrosion Resistance

Cited by 5 publications

References 24 publications

The Effect of Coating Additives on the Properties of Hydrophobic Coatings with Low Infrared Emissivity

The Effect of Coating Additives on the Properties of Hydrophobic Coatings with Low Infrared Emissivity

The Geometric Configuration of Lubricant Recesses of the Polymer Sliding Layer of the Bearing

Effect of Coating Additives on Properties of Hydrophobic Coatings with Low Infrared Emissivity

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