The Adhesion of Glaze and Rime on Aluminium Electrical Conductors

Druez, J.; Phan, C. Luan; Laforte, Jean-Louis; Nguyen, Du Dinh

doi:10.1139/tcsme-1978-0033

Cited by 38 publications

(33 citation statements)

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“…In the case of ice, the interface microstructure at a metallic or metal oxides surface usually range from large polygonal crystals or grains to smaller ones with the same shape produced by recrystallization. The overall process occurs within a few hours after initial freezing [26,27,50]. This process leads to the accumulation of dislocations at the ice surface and occurs in any polycrystalline material subject to a steady stress.…”

Section: Ice Micro Structurementioning

confidence: 99%

Advanced Icephobic Coatings

Menini

Farzaneh

2011

Journal of Adhesion Science and Technology

146

101

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Section: Ice Micro Structurementioning

confidence: 99%

Advanced Icephobic Coatings

Menini

Farzaneh

2011

Journal of Adhesion Science and Technology

146

101

View full text Add to dashboard Cite

“…Par ailleurs, la glace peut adhérer fortement à certaines surfaces car l'eau surfondue pénètre dans les zones poreuses et occupe plus de volume en se solidifiant, créant ainsi un effet d'ancrage mécanique au substrat. La littérature révèle que l'augmentation de la rugosité implique l'augmentation de la force d'adhérence de la glace [17,[34][35].…”

Section: Travaux Antérieursunclassified

Contribution à l'étude des mécanismes de l'adhésion de la glace à différents matériaux et application à l'évaluation des matériaux glaciophobes /

Ghalmi¹

2013

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Several Nordic countries with cold climates like Canada are often subjected to ice storms causing major economic and social losses. Ice or sticky snow adhesion on power network equipment can be a significant issue in transmission and distribution of electrical energy for companies operating in these regions. The costs of such events can be substantial, particularly due to the cessation of economic activities, equipment failures, deicing techniques (active methods), and population safety. Because of such events, power companies have understood the need to develop so-called superhydrophobic and/or icephobic surfaces, which can significantly reduce ice adhesion (passive methods). Several studies have led to the development of a variety of new nanostructured surfaces using various strategies. These studies have led to the design of superhydrophobic surfaces with contact angles greater than 150 and low ice adhesion strength.In order to optimally reduce the ice adhesion strength on different substrates, better understanding of the various mechanisms involved in the icing process is essential. It is in this context and within the framework of Canada's research chair on atmospheric icing of power networks (INGIVRE) that this thesis was carried out, aiming to improve the knowledge of atmospheric icing, and explain the forces involved at the ice/substrate interface. Furthermore, the effect of contact angle, surface roughness and porosity on icing and ice/substrate interface was investigated.This study clearly showed that the electrostatic, van der Waals and hydrogen bond forces are the main contributors to ice adhesion to a surface at the molecular level. The electrostatic energy, based on the principle of image charge, depends on the type of material in contact with the ice, the distance between the ice and the material, and the types of ice surface defects. The van der Waals energy depends on the material type, the thickness of the liquid water layer, and the temperature. For its part, the energy associated with hydrogen bonds depends on the material type, temperature, droplet mass, as well as on IV the static and sliding contact angles. Among these three forces, the electrostatic energy is the largest. Whereas the hydrogen bond energy is larger than the van der Waals energy. However, the latter is always present as long as ice is in contact with a solid surface.The experimental study showed that ice adhesion strength depends on the surface roughness of the substrate. In the case of metals with a thin natural protective oxide layer, higher roughness leads to higher ice adhesion strength. In other words, polished metallic surfaces exhibit lower ice adhesion strengths. However, in the case of anodized aluminum surfaces coated with PTFE, the roughened needle-like structure resulted in lower ice adhesion. The experimental results showed that PTFE coatings remain resistant to icing/deicing cycles. Even after 15 icing/deicing cycles, surfaces remain hydrophobic with a static contact angle greater than 130°. LISTE ...

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“…Les revues de littérature réalisées par Scavuzzo et al [16] et par Ramanathan [17], permettent de bien résumer les résultats expérimentaux sur la valeur de la résistance en cisaillement de la glace à un substrat (Tableau 1 [18][19][20][21][22][23][24][25] [36,37].…”

Section: Valeur De La Force D'adhérence De La Glaceunclassified

Modélisation numérique et validation expérimentale d'un système de protection contre le givre par éléments piézoélectriques /

Harvey¹

2012

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The Adhesion of Glaze and Rime on Aluminium Electrical Conductors

Cited by 38 publications

References 0 publications

Advanced Icephobic Coatings

Advanced Icephobic Coatings

Contribution à l'étude des mécanismes de l'adhésion de la glace à différents matériaux et application à l'évaluation des matériaux glaciophobes /

Modélisation numérique et validation expérimentale d'un système de protection contre le givre par éléments piézoélectriques /

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