[2022-Vol.19-Issue 6]Spontaneous Self-healing Bio-inspired Lubricant-infused Coating on Pipeline Steel Substrate with Reinforcing Anti-corrosion, Anti-fouling, and Anti-scaling Properties
Post: 2022-11-11 14:02  View:115

Journal of Bionic Engineering (2022) 19:1601–1614

Hao Li1,2  · Yujie Peng1  · Kai Zhang3  · Pengchang Li1  · Lei Xin1  · Xiaoli Yin4  · Sirong Yu4

1 School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China

 2 National Engineering Laboratory of Ofshore Geophysical and Exploration Equipment, China University of Petroleum (East China), Qingdao 266580, China 

3 College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China 

4 School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China

Abstract: Superhydrophobic surfaces (SHS) and slippery lubricant-infused porous surfaces (SLIPS) attract great attention due to their multiple properties in both industries and our daily lives. Here, we frst fabricated the SHS with micro-scale fower-like structures composed of nano-sheets on pipeline steel substrate. Then, we obtained the SLIPS by spin-coating lubricant into gaps of micro-scale fower-like structures, with the air still trapped among gaps of nano-sheets. The SLIPS shows excellent liquid repellency as the SHS. The SLIPS also shows stability after the scour of fowing water. These results of polarization curves (Tafel) and electrochemical impedance spectroscopies deduced the SLIPS with better and more stable anti-corrosion property than the SHS. Compared with the SHS, the lack of attachment and CaCO3 on the SLIPS indicates that the SLIPS demonstrates better anti-fouling and anti-scaling properties than the SHS. Moreover, the SLIPS shows promising wear resistance under the abrasion simulated by sandpaper compared with the SHS. Notably, the air trapped among nano-sheets is conducive to the lubricant fowing to the surface quickly, exhibiting spontaneous self-healing in atmosphere, even if part fower-like structures of the SLIPS subject to damage with the lubricant consumed after scratched. 

Keywords: Pipeline steel · Bioinspiration · Slippery surface · Self-healing


FE-SEM images (a–c) and EDS spectra (d–f) of the steel sample under different conditions: a and d electrodeposition, b and e electrodeposition?+?chemical oxidation, and c and f the SHS: electrodeposition?+?chemical oxidation?+?low-energy modification

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