Super-Hydrophobic Co–Ni Coating with High Abrasion Resistance Prepared by Electrodeposition

Abstract

Although super-hydrophobic surfaces have great application prospects in industry, their preparation cost and mechanical durability have limited their practical utilization. In this work, we presented a new low-cost process preparation for super-hydrophobic Co–Ni coating on carbon steel substrate via an electrodeposition route. The deposited Co–Ni coating with cauliflower-shaped micro-nano structures exhibited high super-hydrophobic properties with water contact angles over 161° after modification with 1H,1H,2H,2H-Perfluorooctyltrichlorosilane (PFTEOS). Evaluated by the linear abrasion methods, the super-hydrophobic coating can maintain super-hydrophobicity after abrasion distance of 12 m under the applied pressure of 5 kPa, which was attributed to the high cobalt content of the Co–Ni coating. Moreover, electrochemical tests showed that the super-hydrophobic Co–Ni coatings exhibited a good anti-corrosion performance thus providing an adequate protection to the carbon steel substrates.

Robust Self‐Cleaning and Marine Anticorrosion Super‐Hydrophobic Co–Ni/CeO2 Composite Coatings

“…To improve the wear resistance of the superhydrophobic coating, its microhardness was improved by adding second-phase particles, which was proved effective through our works. [21,36] The testing of qualitative surface energy on the superhydrophobic coating includes self-cleaning effect (Figure 7). Figure 7a shows the photograph of static water droplet on the superhydrophobic Co-Ni/CeO 2 coating electrodeposited with 3.44 g L À1 CeO 2 particle contents, and the measured WCA was over 160 (Figure 5a).…”

“…Sample Preparation: The electrodeposition process was introduced in previous studies using three-electrode system with SCE as the reference electrode. [21] The commercial carbon steel (20#) was cut into the size of The units of R s , R ct , R c , and CPE are Ω cm 2 , kΩ cm 2 , kΩ cm 2 , and Ω À1 s n cm À2 , respectively.…”

Robust Super-Hydrophobic Coating Prepared by Electrochemical Surface Engineering for Corrosion Protection

“…However, on the 800-grit sandpaper, stronger stability of super-hydrophobic properties was observed, the WCA of the Ni-PTFE composite coating can retain 150 • after 48 m of abrasion under the applied pressure of 2.0 kPa. Xue et al presented a electrodeposition route for super-hydrophobic Co-Ni coatings on carbon steel substrate which exhibited outstanding wear resistance [96]. The Co-Ni coating with micro-nano structures deposited at −1.7 V showed the highest surface roughness with Ra of 7.77 µm, which was much higher than that of −1.0 V (0.63 µm) and −1.4 V (1.71 µm).…”

“…(a,b) Effect of abrasion length on WCA of Ni-PTFE composite coatings and CSHST coatings under 400 and 800 grit SiC papers, respectively. Reprinted from[95], Copyright (2017), with permission from Elsevier; (c-e) SEM images and inserted profiles of a water droplet for super-hydrophobic Co-Ni coating before abrasion and after abrasion wear of 6 m and 12 m under the applied pressure of 5 kPa, respectively; (f) Variations of the WCA and WSA on the tested surface with the abrasion distance[96]. Copyright (2019), with permission from MDPI AG.…”

Effect of Substrate Grain Size on Structural and Corrosion Properties of Electrodeposited Nickel Layer Protected with Self-Assembled Film of Stearic Acid

“…Hierarchical micro-/nanostructured materials with various shapes and properties are widely used in different applications like as optical materials [1], low adhesive surfaces [2], abrasion-resistant surfaces, anti-icing films [3][4][5][6], anticorrosion coatings [7][8][9], and in the fabrication of superhydrophobic surfaces [10,11]. The superhydrophobicity phenomenon was first observed in lotus leaves in nature [12,13], and it is frequently used to describe surface properties with a water contact angle (CA) larger than 150 • and sliding angle less than 10 • [14,15].…”