Title Highly resistant icephobic coatings on aluminum alloys
Author Menini, R.; Ghalmi, Z.; Farzaneh, M.
Author Affil Menini, R., National Sciences and Engineering Research Council of Canada/Hydro-Quebec/Université du Québec à Chicoutimi, Industrial Chair on Atmospheric Icing of Power Network Equipment, Chicoutimi, QC, Canada. Other: U. S. Army Engineer Research and Development Center, Cold Regions Research and Engineering Laboratory
Source Anti-icing and de-icing techniques, edited by M. Farzaneh and C.C. Ryerson. Cold Regions Science and Technology, 65(1), p.65- 69, . Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0165-232X
Publication Date Jan. 2011
Notes In English. Based on Publisher- supplied data GeoRef Acc. No: 309980
Index Terms adhesion; aircraft; aluminum; experimentation; ice; low temperature research; mechanical properties; metals; power lines; structures; temperature; alloys; anodizing; centrifuge methods; durability; etching; experimental studies; hydrophobic materials; infrastructure; low temperature; polytetrafluoroethylene; protection
Abstract Aluminum alloys are widely used for outdoor structures such as ground wires and phase conductors of overhead power lines, as well as aircrafts wings and fuselage. To protect these surfaces against excessive ice accumulation, icephobic coatings must be highly reliable and durable. New coatings with icephobic characteristics and excellent mechanical properties have been developed. The method consisted in depositing an extremely adherent poly(tetrafluoroethylene) (PTFE) coating on an Al2O3 underlayer produced by anodizing in a phosphoric acid electrolyte followed by an oxide etching step to enhance surface roughness. PTFE impregnation was carried out at low temperature (320°C) and coating adhesion was assessed using tape and bend tests. Some of these coatings showed superhydrophobic properties; ice adhesion was around four times lower than bare aluminum. As well, they remained effective after ten ice-shedding events using an aggressive centrifugal technique. Moreover, no sign of PTFE degradation after 14 ice removals was noted and the coatings remained extremely adherent and very hydrophobic. This technique therefore shows very good potential and could be applied to new high-voltage overhead aluminum cables as protection against excessive ice or snow accumulation.
URL http://hdl.handle.net/10.1016/j.coldregions.2010.03.004
Publication Type journal article
Record ID 65006872