Title: Investigation on the salt electrochemical corrosion resistance of a robust superhydrophobic thin film with controllably inlaid micro/nano composite structures

Authors: Zheng Tan; Wenxin Tan; Zhiming Zhu; Jiayu Li; Li Zhang; Bo Hao

Addresses: Northeastern University at Qinhuangdao, No.143, Taishan Road, Haigang District, Qinhuangdao 066004, China ' Northeastern University at Qinhuangdao, No.143, Taishan Road, Haigang District, Qinhuangdao 066004, China ' Northeastern University at Qinhuangdao, No.143, Taishan Road, Haigang District, Qinhuangdao 066004, China ' Northeastern University at Qinhuangdao, No.143, Taishan Road, Haigang District, Qinhuangdao 066004, China ' Northeastern University at Qinhuangdao, No.143, Taishan Road, Haigang District, Qinhuangdao 066004, China; Key Laboratory of Vibration and Control of Aero-Propulsion System, Ministry of Education, Northeastern University, Shenyang 110819, China ' Northeastern University at Qinhuangdao, No.143, Taishan Road, Haigang District, Qinhuangdao 066004, China; Key Laboratory of Vibration and Control of Aero-Propulsion System, Ministry of Education, Northeastern University, Shenyang 110819, China

Abstract: In recent years, research on the preparation of superhydrophobic thin films with the assistance of laser texturing to improve the corrosion resistance have been advancing rapidly. In this study, a controllable biomimetic superhydrophobic thin film preparation method was designed, in which a micron grid groove 'vessel' structure was constructed on the surface of 316L stainless steel by laser texturing. Moreover, SiO₂/PDMS nanoparticles were inlaid in the 'vessel' by spraying to form a micro/nano composite structure film. This film has excellent robustness, which was verified by abrasion tests. Then, the samples were tested by potentiodynamic polarisation (PDP) and electrochemical impedance spectroscopy (EIS) to analyse the salt corrosion resistance. The results show that the superhydrophobic salt corrosion resistant film is effective. This study contributes to the development of metal corrosion resistant films and provides a convenient and effective means of metal corrosion resistance in the industrial field.

Keywords: micro/nano composite structures; laser texturing; superhydrophobic thin film; robustness; salt electrochemical corrosion resistance.

DOI: 10.1504/IJSURFSE.2025.144835

International Journal of Surface Science and Engineering, 2025 Vol.19 No.1, pp.4 - 21

Received: 31 Aug 2023
Accepted: 16 Dec 2023
Published online: 04 Mar 2025 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article