Eco-friendly method for construction of superhydrophobic graphene-based coating on copper substrate and its corrosion resistance performance

Abstract

In this work, Ni and Ni-graphene, Ni-G, films were electrodeposited on copper substrate by potentiostatic deposition. To achieve superhydrophobicity, myristic acid, MA, was used to modify the surface of the electrodeposited coatings. The manufactured Ni film modified with myristic acid, Ni-MA, and the Ni-G film modified with myristic acid, Ni-G-MA, show excellent superhydrophobic, SHP, properties with a water contact angle of 159° and 162°, respectively. The surface morphology of the prepared SHP films was investigated using a Scanning Electron Microscope, and the results revealed micro-nano structures in both Ni-MA and Ni-G-MA films. The Fourier Transform Infrared Spectrophotometer data showed that the Ni-MA and Ni-G-MA films were successfully grafted on the copper metal. The Ni-G-MA film possessed higher chemical stability and mechanical abrasion resistance than Ni-MA. The Ni-MA and Ni-G-MA films exhibit long-term durability in the outdoor environment for more than four months. The potentiodynamic polarization and electrochemical impedance spectroscopy results demonstrated that the SHP films on the copper substrate exhibit remarkable corrosion resistance in 0.5 M NaCl.

Construction of superhydrophobic graphene-based coating on steel substrate and its ultraviolet durability and corrosion resistance properties

“…Since increasing surface roughness improves the hydrophilicity of hydrophilic surfaces, and improves the hydrophobicity of hydrophobic surfaces. So, doping of hydrophilic Ni@G coat with Cr will enhance the surface roughness and so the hydrophilic characteristics will be improved and the contact angle decreases 58 . The WCA and WSA values for Ni@G@MA film are 158° and 4°, respectively, while they are 168° and 1° for Ni@Cr-G@MA.…”

Fenugreek seed and cape gooseberry leaf extracts as green corrosion inhibitors for steel in the phosphoric acid industry

“…1 b, shows the absorption bands for OH of the phenolic compound at 3413 cm −1 26 . At 1732 cm −1 , the stretching vibration of C=O of the carboxyl group occurs, the aromatic ring's C–H stretching vibration at 2925 cm −1 , C=C vibration at 1627 cm −1 , aromatic C=C bond at 1430 cm −1 , unsymmetric stretching of the C–O–C bridge bond and C–O–C cyclic ether at 1154 and 1102 cm −1 , respectively 27 . These bands are similar to those of ferulic acid, isolated from CgL leaf extract 28 , 29 .…”

“…The PZC of a material in solution is the point at which minimum capacitance is obtained. The open circuit potential with respect to the PZC determines the metal's surface charge 27 . The open circuit potential (E ocp ) and E PZC values for steel in 20% phosphoric acid solution are − 440 mV and − 449 mV, respectively.…”

Hydrophobic Modification of the α‐Hemihydrate Phosphogypsum (α‐HH) Surface by Myristic Acid

“…MA is non-toxic and commonly used in hydrophobic and super hydrophobic (SHP) coatings. [15][16][17][18] Racca et al utilized MA and SA to modify CaCO 3 nanoparticles. [19] Compared to CaCO 3 -SA nanoparticles, CaCO 3 -MA nanoparticles exhibit a smaller particle size, higher thermal stability, hydrophobicity, and improved compatibility with a thermoplastic matrix.…”

“…Myristic acid (MA), also known as tetradecanoic acid, is an inexpensive saturated fatty acid that is derived from readily available raw materials. MA is non‐toxic and commonly used in hydrophobic and super hydrophobic (SHP) coatings [15–18] . Racca et al.…”