Experimental study on the anti-fouling effects of EDM machined hierarchical micro/nano structure for heat transfer surface

He, Z.R.; Liu, C.S.; Gao, Heng; Jie, Xiaohua; Lian, Weiqi

doi:10.1016/j.applthermaleng.2019.114248

Cited by 28 publications

(16 citation statements)

References 58 publications

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“…Hence, the induction period of Fe-Al MNS is extended, as shown in Figure 9. Moreover, the micro/nanostructures increased the boiling bubble activity, which creates a porous surface [41,42], and the detachment of the boiling bubble dislodged the loose fouling from the surface with wiping action [9,43]. As shown in Figure 14c,f, the Al proportion in the coating also influenced the antifouling property.…”

Section: Discussionmentioning

confidence: 90%

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Fabrication of Fe‒Al Coatings with Micro/Nanostructures for Antifouling Applications

Wang

Fan

et al. 2020

Coatings

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Fouling is one of the common problems in heat-transfer applications, resulting in higher fouling resistance, and lower heat-transfer coefficient. This paper introduces the design and fabrication of an Fe–Al coating with micro/nanostructures on low-carbon steel by electrical discharge coating (EDC) technology to improve the antifouling property. The Fe–Al coating with micro/nanostructures is characterized by a large number of micro/nanostructures and superior anti-fouling property, which is attributed to its hydrophobic surface. The antifouling property, fouling induction period and contact angle of the Fe–Al coating with micro/nanostructures increase with the increasing gap voltage. Compared with the polished surface of low-carbon steel, the Fe–Al coating with micro/nanostructures extends the induction period from 214 to 1350 min, with a heat flux of 98 kW·m−2. After 50 adhesion tests, the contact angle of the Fe–Al coating with micro/nanostructures decreases from 6.81% to 27.52%, which indicates that the Fe–Al coating with micro/nanostructures is durable and suitable for industrial applications.

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Section: Discussionmentioning

confidence: 90%

“…Compared with a plain surface, a hydrophobic surface with micro/nanostructures shows a better antifouling property [9,10]. Bogacz et al [11] found that the mass of crystalline deposits grew with the increased wettability of the surface.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Fe‒Al Coatings with Micro/Nanostructures for Antifouling Applications

Wang

Fan

et al. 2020

Coatings

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“…The coatings were found to have anti-fouling properties and researchers speculated that increasing the value of surface free energy promotes fouling. He et al [122] investigated the anti-fouling properties of hierarchical micro/nano structure (HMNS) surfaces produced by electrical discharge machining (EDM). Results show that such treatment improves hydrophobicity, anti-corrosion properties and surface roughness.…”

Section: Fouling Inhibition and Cleaningmentioning

confidence: 99%

A Review of Crystallization Fouling in Heat Exchangers

et al. 2021

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A vast majority of heat exchangers suffer from unwanted deposition of material on the surface, which severely inhibits their performance and thus marks one of the biggest challenges in heat transfer. Despite numerous scientific investigations, prediction and prevention of fouling remain unresolved issues in process engineering and are responsible for large economic losses and environmental damage. This review article focuses specifically on crystallization fouling, providing a comprehensive overview of the state-of-the-art of fouling in heat exchangers. The fundamentals of the topic are discussed, as the term fouling resistance is introduced along with distinct fouling behaviour, observed in laboratory and industrial environments. Insight into subsequent phases of the fouling process is provided, along with the accompanying microscale events. Furthermore, the effects of fluid composition, temperature, flow velocity, surface condition, nucleate boiling and composite fouling are comprehensively discussed. Fouling modelling is systematically reviewed, from the early work of Kern and Seaton to recently used artificial neural networks and computational fluid dynamics. Finally, the most common fouling mitigation approaches are presented, including design considerations and various on-line strategies, as well as off-line cleaning. According to our review, several topics require further study, such as the initial stage of crystal formation, the effects of ageing, the interplay of two or more fouling mechanisms and the underlying phenomena of several mitigation strategies.

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“…He et al [ 23 ] investigated the anti-fouling effects of EDM machined hierarchical micro/nano structure (HMNS). Figure 9 depicted the relationship between the roughness (Ra and Rz) and the WCA of samples machined by the process of EDM.…”

Section: Electrical Discharge Machiningmentioning

confidence: 99%

Progress in Non-Traditional Processing for Fabricating Superhydrophobic Surfaces

Shen¹,

Ming

Ren

et al. 2021

Micromachines

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When the water droplets are on some superhydrophobic surfaces, the surface only needs to be inclined at a very small angle to make the water droplets roll off. Hence, building a superhydrophobic surface on the material substrate, especially the metal substrate, can effectively alleviate the problems of its inability to resist corrosion and easy icing during use, and it can also give it special functions such as self-cleaning, lubrication, and drag reduction. Therefore, this study reviews and summarizes the development trends in the fabrication of superhydrophobic surface materials by non-traditional processing techniques. First, the principle of the superhydrophobic surfaces fabricated by laser beam machining (LBM) is introduced, and the machining performances of the LBM process, such as femtosecond laser, picosecond laser, and nanosecond laser, for fabricating the surfaces are compared and summarized. Second, the principle and the machining performances of the electrical discharge machining (EDM), for fabricating the superhydrophobic surfaces, are reviewed and compared, respectively. Third, the machining performances to fabricate the superhydrophobic surfaces by the electrochemical machining (ECM), including electrochemical oxidation process and electrochemical reduction process, are reviewed and grouped by materials fabricated. Lastly, other non-traditional machining processes for fabricating superhydrophobic surfaces, such as ultrasonic machining (USM), water jet machining (WJM), and plasma spraying machining (PSM), are compared and summarized. Moreover, the advantage and disadvantage of the above mentioned non-traditional machining processes are discussed. Thereafter, the prospect of non-traditional machining for fabricating the desired superhydrophobic surfaces is proposed.

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Experimental study on the anti-fouling effects of EDM machined hierarchical micro/nano structure for heat transfer surface

Cited by 28 publications

References 58 publications

Fabrication of Fe‒Al Coatings with Micro/Nanostructures for Antifouling Applications

Fabrication of Fe‒Al Coatings with Micro/Nanostructures for Antifouling Applications

A Review of Crystallization Fouling in Heat Exchangers

Progress in Non-Traditional Processing for Fabricating Superhydrophobic Surfaces

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