Anti-icing Behavior of Thermally Sprayed Polymer Coatings
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Anti-icing Behavior of Thermally Sprayed Polymer Coatings Heli Koivuluoto1 • Christian Stenroos1 • Mikko Kylma¨lahti1 • Marian Apostol1 Jarkko Kiilakoski1 • Petri Vuoristo1
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Submitted: 30 June 2016 / in revised form: 20 September 2016 ASM International 2016
Abstract Surface engineering shows an increasing potential to provide a sustainable approach to icing problems. Currently, several passive anti-ice properties adoptable to coatings are known, but further research is required to proceed for practical applications. This is due to the fact that icing reduces safety, operational tempo, productivity and reliability of logistics, industry and infrastructure. An icing wind tunnel and a centrifugal ice adhesion test equipment can be used to evaluate and develop anti-icing and icephobic coatings for a potential use in various arctic environments, e.g., in wind power generation, oil drilling, mining and logistic industries. The present study deals with evaluation of icing properties of flame-sprayed polyethylene (PE)-based polymer coatings. In the laboratoryscale icing tests, thermally sprayed polymer coatings showed low ice adhesion compared with metals such as aluminum and stainless steel. The ice adhesion strength of the flame-sprayed PE coating was found to have approximately seven times lower ice adhesion values compared with metallic aluminum, indicating a very promising antiicing behavior. Keywords anti-icing flame spraying polymer coatings wear behavior
This article is an invited paper selected from presentations at the 2016 International Thermal Spray Conference, held May 10-12, 2016, in Shanghai, P.R. China, and has been expanded from the original presentation. & Heli Koivuluoto [email protected] 1
Department of Materials Science, Tampere University of Technology, Korkeakoulunkatu 6, 33720 Tampere, Finland
Introduction Ongoing climate change, opening of new logistic routes, energy and mineral resources as well as increasing tourism feed the growing activity in cold climate regions. One of the major challenges for operations in these areas is ice and snow accretion. Icing reduces safety, operational tempo, productivity and reliability of logistics, industry and infrastructure. Atmospheric icing on the surfaces is a very complex phenomenon and multiple factors affect the accretion process and behavior of ice on the surface (Ref 1). From a climatic point of view, several basic processes influence greatly the severity of icing, accretion rate and ice type. These are water cycle, wind speed, the formation of clouds, precipitation and the presence of different phases (vapor, liquid and solid) of atmospheric water (Ref 2-4). Several factors affect the ice accretion and ice adhesion. For instance, surface topography, surface chemistry and wetting behavior as well as ice characteristics (type, temperature and liquid water content) have been reported having an influence on ice adhesion, indicating the complexity of icing on surfaces (Ref 5-8). Surface engineering has high potential as a
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