Boiling water treatment for wettability improvement of aluminum fin surfaces

Jianlong Gao, Jiheng Zhao, Xinmiao Chen, Wei Xue, Liping Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

This work reports the effectiveness of a simple and rapid method for wettability improvement on aluminum surfaces - boiling water treatment. The wetting behavior and drainage performance on a series of aluminum surface samples after different lengths of boiling water treatment (3 minutes, 5 minutes, and 10 minutes) are examined. The data of contact angles for different sizes of droplets placed on these samples are reported with detailed surface roughness information from a 3D optical surface profiler. The contact angles are observed to decrease from the original value of 94.5° to approximately 10° after 10 minutes of treatment, and the reduction is correlated with the treatment length. Scanning electron microscopy (SEM) images and 3D optical profiler images suggest that the boiling water treatment facilitates oxidation of the sample surface and greatly alters the micro-structures on the surface, which are believed to be the two main reasons to change the droplet wetting behavior. The contact angle measurements are conducted again two days after the treatment and the hydrophilicity is retained.

Original languageEnglish (US)
Title of host publicationHeat Transfer and Thermal Engineering
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Print)9780791856352
DOIs
Publication statusPublished - Jan 1 2013
EventASME 2013 International Mechanical Engineering Congress and Exposition, IMECE 2013 - San Diego, CA, United States
Duration: Nov 15 2013Nov 21 2013

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume8 B

Other

OtherASME 2013 International Mechanical Engineering Congress and Exposition, IMECE 2013
CountryUnited States
CitySan Diego, CA
Period11/15/1311/21/13

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All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

Gao, J., Zhao, J., Chen, X., Xue, W., & Liu, L. (2013). Boiling water treatment for wettability improvement of aluminum fin surfaces. In Heat Transfer and Thermal Engineering (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); Vol. 8 B). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2013-62697