Original Title:
Durable bi-functional coating on stainless steel 304
Languages of Item:
English
Creator:
Nanou, Paraskevi
Zarkadoulas, Athanasios
Stathopoulos, Vassilis
Affiliation:
Laboratory of Chemistry and Materials Technology, Department of Agricultural Development, Agrofood and Management of Natural Resources, National and Kapodistrian University of Athens, Psachna Campus, Evia, Greece
Abstract:
Industries can benefit from utilizing low-temperature waste heat as an energy source, but its
recovery is challenging due to the need for specific materials that can withstand below dew
point temperatures and corrosive flue gases [1,2]. To address these obstacles, durable bifunctional coatings are crucial, because the coatings that exhibit characteristics like superhydrophobicity [3], dropwise condensation (DwC) [4], and corrosion protection [5], can
notably improve the efficiency waste heat recovery systems. Specifically, avoiding filmwise
condensation (FwC) and augmenting dropwise condensation (DwC), can lead to improvements
in the rate of water condensation and heat transfer [6]. This research focuses on the
development and evaluation of such bi-functional coatings that exhibit superior durability,
superhydrophobicity, and corrosion protection for 304 stainless steel. These coatings exhibit
limited interaction with corrosive aqueous media, demonstrated by a high contact angle
(157.8o) and low roll-off angle (2.6o). Additionally, the coated specimens can efficiently
condense humidity in a dropwise manner and withstand continuous condensation for 120
hours. The coatings also display thermal shock and wear resistance while providing 91.4%
corrosion protection efficiency.
Acknowledgements
This research has been co-financed by the European Regional Development Fund of the
European Union and Greek national funds through the Operational Program Competitiveness,
Entrepreneurship and Innovation, under the call “Special Actions AQUACULTURE –
INDUSTRIAL MATERIALS – OPEN INNOVATION IN CULTURE” (project code: T6YBP-00350).
Main subject category:
Chemical Engineering and Materials Science
Keywords:
coating
stainless steel
Notes:
Includes bibliographical references:
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