Preparation of super-hydrophobic micro-needle CuO surface as a barrier against marine atmospheric corrosion
By Dou, Wenwen; Wu, Jiajia; Gu, Tingyue; Wang, Peng; Zhang, Dun
Published in Corrosion Science
2018
Abstract
A super-hydrophobic (SH) CuO surface was prepared on copper using chemical etching followed by fluorination treatment. The relationship between surface morphology and hydrophobicity was investigated. When the etching time varied from 5 to 120min, morphology changed from sparse sharp needles to dense sharp needles, and then to a stamen-like structure with flower-like clusters. All these surfaces were SH with the dense micro-needle surface (10min etching) the best. This SH surface made salt (NaCl) particles deliquesce and roll away. Electrochemical tests showed that it reduced corrosion in a 3.5% (w/w) NaCl solution by more than 102 times.
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