Analysis of Contact Angle for Metallic Materials in Wastewater Pumps

Savin, C; Nejneru, Carmen; Tugui, Catalin Andrei; Perju, Manuela Cristina; Sandu, Andrei Victor; Bejinariu, Costică

doi:10.37358/rc.19.8.7433

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…In addition, research on modifications of liquids has primarily focused on ionic species and concentrations, studies on gas modifications remain relatively scarce [ 80 ]. However, it is worth noting that unlike liquids and gases, solid materials are more susceptible to wear issues during friction and are prone to corrosion [ 81 , 82 ]. Conversely, liquid–liquid and gas–liquid interfaces offer distinct advantages in terms of longevity and wear resistance.…”

Section: Influence Of Different Interface Conditions On the Ce Proces...mentioning

confidence: 99%

A Review of Contact Electrification at Diversified Interfaces and Related Applications on Triboelectric Nanogenerator

Hu,

Iwamoto,

Chen

2023

Nano-Micro Lett.

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The triboelectric nanogenerator (TENG) can effectively collect energy based on contact electrification (CE) at diverse interfaces, including solid–solid, liquid–solid, liquid–liquid, gas–solid, and gas–liquid. This enables energy harvesting from sources such as water, wind, and sound. In this review, we provide an overview of the coexistence of electron and ion transfer in the CE process. We elucidate the diverse dominant mechanisms observed at different interfaces and emphasize the interconnectedness and complementary nature of interface studies. The review also offers a comprehensive summary of the factors influencing charge transfer and the advancements in interfacial modification techniques. Additionally, we highlight the wide range of applications stemming from the distinctive characteristics of charge transfer at various interfaces. Finally, this review elucidates the future opportunities and challenges that interface CE may encounter. We anticipate that this review can offer valuable insights for future research on interface CE and facilitate the continued development and industrialization of TENG.

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Section: Influence Of Different Interface Conditions On the Ce Proces...mentioning

confidence: 99%

A Review of Contact Electrification at Diversified Interfaces and Related Applications on Triboelectric Nanogenerator

Hu,

Iwamoto,

Chen

2023

Nano-Micro Lett.

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“…The wastewater used in the measurements was filtered with filter paper in order not to create problems in the measuring device (goniometer), there is a danger of clogging the drop release hole. Since the presence of particles in suspension has relatively little effect on the hydrophilic or hydrophobic nature of metallic materials, this does not significantly affect the results [22].…”

Section: The Determination Of the Contact Anglementioning

confidence: 99%

Analysis of the Physical-Mechanical Properties of the Zinc Phosphate Layer Deposited on a Nodular Cast Iron Substrate

et al. 2022

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The rotors of submersible wastewater pumps, generally made of nodular graphite cast iron, are subjected to complex processes of corrosive erosion during operation. To improve the characteristics of erosion resistance by impact with solid particles in the corrosive environment of wastewater, cast iron was subjected to a chemical phosphating treatment. In the paper, the scratch test behaviour of nodular cast iron and phosphate nodular cast iron is analysed comparatively, studying the behaviour of the deposited layer and its adhesion to the substrate. The nanoindentation characteristics of nodular cast iron and phosphate nodular cast iron were also studied. It was observed that the deposited layer is not compact, but when pressed, it does not crack and does not detach from the substrate; it is impregnated in the substrate in the metal matrix, but not on the area with carbon nodules. The SEM micrographs show that the deposited phosphate layer is relatively porous and can change the behaviour of the liquid flow moving on the surface of the rotor due to its hydrophilic behaviour; this also allows the formation of a boundary layer that adheres to the surface of the rotor and protects it from the impacts of microparticles driven by the liquid stream.

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“…synthetic cooling media for quenching are very diverse and sometimes contain by-products or wastes resulting from different industries [15]. Carboxymethyl cellulose is a cellulose gum derivative with carboxymethyl groups (-Ch2-Cooh) that results as a by-product of papermaking [16,17]. in an aqueous solution between 1.5-3.5 wt.% with additives, it can be used as a cooling medium.…”

Section: Introductionmentioning

confidence: 99%

Study of the Effect of Intensity of Vibrations and Temperature on the Cooling Characteristics of Quenching Media

Perju,

Nejneru,

Burduhos-Nergis

et al. 2023

Archives of Metallurgy and Materials

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Study of the effect of IntenSIty of VIbratIonS and temperature on the coolIng characterIStIcS of QuenchIng medIaQuenching technology requires the use of media with different cooling intensities and various shapes of cooling curves that show different particularities compared to that of conventional media such as water, oil, or emulsions. The use of synthetic quenching media is relatively new and also has multiple advantages such as non-flammability, safety in use and low cost. in this study, the cooling media tested was obtained by mixing 2 wt% carboxymethyl cellulose with 2 wt% Naoh in one litter of water. Moreover, three different temperatures (20°C, 40°C and 60°C) of the quenching media were evaluated. By dissolution in water, a synthetic solution with low viscosity, surfactant and lubricant was obtained. Because carboxymethyl cellulose is a biodegradable organic material, that is obtained as a by-product in the manufacture of paper, a basic substance with a preservative effect was added. according to this study, both the variation diagram of the heat transfer coefficient and the diagram of the cooling rates, during the cooling stages give important indications regarding the use of a liquid cooling medium for quenching.

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Analysis of Contact Angle for Metallic Materials in Wastewater Pumps

Cited by 3 publications

References 14 publications

A Review of Contact Electrification at Diversified Interfaces and Related Applications on Triboelectric Nanogenerator

A Review of Contact Electrification at Diversified Interfaces and Related Applications on Triboelectric Nanogenerator

Analysis of the Physical-Mechanical Properties of the Zinc Phosphate Layer Deposited on a Nodular Cast Iron Substrate

Study of the Effect of Intensity of Vibrations and Temperature on the Cooling Characteristics of Quenching Media

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