Fabrication of a Robust Superhydrophobic Ni Coating with Micro–Nano Dual‐Scale Structures on 316L Stainless Steel

Abstract

Herein, a superhydrophobic Ni coating is prepared on 316L stainless steel by electrodeposition and low energy modification with tetradecanoic acid. After 20 min of electrodeposition with a current density of 8 A dm−2, a Ni coating with micro–nano dual‐scale structures is obtained. The coating becomes superhydrophobic with a water contact angle (WCA) of 160.4° and a sliding angle (SA) of 8.3° after being immersed in the tetradecanoic acid solution (5 g L−1, 12 h). A two‐level structure model is established for explaining the effect of morphology on the wettability of the coating. The WCA value of the superhydrophobic Ni coating retains above 150° after being exposed in outdoor environment for 6 months and in flowing environment for 7 days. In addition, the coating still shows superhydrophobicity after 9 times of mechanical abrasion test, 12 h of acid soaking (pH = 1), and 16 h of heat treatment in 200 °C. Moreover, the coating improves the corrosion resistance of the steel substrate. This superhydrophobic Ni coating provides a simple method to prevent stainless steel from corrosion. And the theoretical calculation of the two‐level model can provide an innovative strategy for designing the structure of the superhydrophobic coating.

Substrate-Independent Superhydrophobic Coating Capable of Photothermal-Induced Repairability for Multiple Damages Fabricated via Simple Blade Coating

“…There are highly abundant superhydrophobic surfaces with water contact angles (WCAs) larger than 150° and water sliding angles (WSAs) smaller than 10° in nature, such as lotus leaves, rice leaves, and butterfly wings, which provide rich sources of inspiration for the development of novel functional materials. Inspired by animals and plants in nature, plenty of artificial superhydrophobic surfaces have been prepared through various methods such as sol–gel, , chemical etching, , electrodeposition, , anode oxidation, , and laser ablation. − Moreover, the potential applications of the superhydrophobic surfaces, including self-cleaning, ,,− antifogging, , antibiofouling, , anticorrosion, , oil/water separation, − and anti-icing, ,− have been extensively explored. However, the water-repellency property of most of the reported superhydrophobic surfaces is easily degraded under external force, oil pollution, a corrosion medium, or a cold environment because of damage of the micro/nanostructures or the decomposition of the low-surface-energy molecules, which limits the practical application of the superhydrophobic surfaces.…”

“…There are highly abundant superhydrophobic surfaces with water contact angles (WCAs) larger than 150°and water sliding angles (WSAs) smaller than 10°in nature, such as lotus leaves, rice leaves, and butterfly wings, which provide rich sources of inspiration for the development of novel functional materials. Inspired by animals and plants in nature, plenty of artificial superhydrophobic surfaces have been prepared through various methods such as sol−gel, 1,2 chemical etching, 3,4 electrodeposition, 5,6 anode oxidation, 7,8 and laser ablation. 9−13 Moreover, the potential applications of the superhydrophobic surfaces, including self-cleaning, 3,4,14−17 antifogging, 18,19 antibiofouling, 20,21 anticorrosion, 5,6 oil/water separation, 22−24 and anti-icing, 20,25−27 have been extensively explored.…”

Hydrogen bubble-templated electrodeposition of superhydrophobic Zn–Ni films

“…36,37 Subsequently, hydrophobicity can be improved by modification with low surface energy substances. 38,39 Hydrogen is inevitably generated during electrodeposition. A hierarchical structure can be obtained by H 2 bubbletemplated electrodeposition.…”

“…36,37 Subsequently, hydrophobicity can be improved by modification with low surface energy substances. 38,39…”

Study on Anti-Scale and Anti-Corrosion of Polydopamine Coating on Metal Surface

“…The electroplating process has many advantages, such as a simple preparation method, low cost, controllable plating conditions, and unlimited base size [23][24][25]. It was found that plating accelerated the dopamine polymerization rate and facilitated the preparation of PDA coating [26][27][28].…”