Electrodeposited Zn for Water-Repellent Coatings | Zendy

Boyang Gao | Zendy; Kristin M. Poduska | Zendy

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Electrodeposited Zn for Water-Repellent Coatings

Author(s) -

Boyang Gao,

Kristin M. Poduska

Publication year - 2018

Publication title -

journal of the electrochemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.258

H-Index - 271

eISSN - 1945-7111

pISSN - 0013-4651

DOI - 10.1149/2.1141810jes

Subject(s) - electrolyte , deposition (geology) , electrochemistry , stearic acid , materials science , chemical engineering , water repellent , pulmonary surfactant , metallurgy , chemistry , inorganic chemistry , electrode , composite material , paleontology , sediment , engineering , biology

We show that mildly alkaline electrolytes can be used to produce Zn coatings that improve the water repellent properties of stainless steel. Optimal Zn deposits were prepared under potentiostatic conditions from electrolytes that contained ZnCl2, NH4Cl, and a surfactant (polyethyleneimine). After deposition, the Zn electrodeposit was capped with stearic acid to prevent oxidation and to provide a lower surface energy. The capped electrodeposits display an impressive degree of water repellency, including extremely poor water droplet adhesion. We discuss the range of deposition parameters (electrolyte composition, pH, and applied potential) that produce the best water-repellent electrodeposits.

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