Ultra low water adhesive metal surface for enhanced corrosion protection

Gang Wang, Zhixiang Zeng, Junjun Chen, Mengya Xu, Jingfang Zhu, Shuan Liu, Tianhui Ren*, Qunji Xue

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

14 Citations (Scopus)

Abstract

A superhydrophobic surface with ultra low water adhesive force is fabricated on various metals for enhanced corrosion protection. The superhydrophobic surface is constructed by passivated zinc oxide (ZnO) and low surface energy poly(dimethylsiloxane) (PDMS). The process of wettability transformation and corrosion are evaluated by a salt spray test and electrochemical measurement. The superhydrophobic surface is separated layer-by-layer to reveal the function of each layer in corrosion protection. The surface adhesive force is applied as a novel metric for precisely determining the wettability state on the substrate surface. The results reveal that the ultra low water adhesive force of the superhydrophobic surface can effectively suppress water condensation on the metal surface which can suppress the transformation from the Cassie to Wenzel state. The superhydrophobic surface can effectively inhibit corrosion because of the synergistic effect of the triple layered protection system of air, PDMS and ZnO.

Original languageEnglish
Pages (from-to)40641-40649
Number of pages9
JournalRSC Advances
Volume6
Issue number47
Early online date12 Apr 2016
DOIs
Publication statusE-pub ahead of print - 12 Apr 2016

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