Abstract
In this work, a superhydrophobic coating was developed by composite electrodeposition of MoS2 particles in a copper matrix. AISI 316L stainless steel and N80 carbon steel, with a thin electrodeposited Ni layer to improve adherence of the coating, were used as substrates. Different operational parameters of electrodeposition were studied in order to produce the highest possible contact angle. We demonstrate that, using this method, a coating with a hierarchical structure with feature dimensions in the range of µm to nm is obtained, with advancing contact angle values up to 158.2° and a contact angle hysteresis equal to 1.8°. To study the coating composition energy dispersive X-ray, X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry were performed. Moreover, potentiodynamic polarizations were performed in H2SO4, NaCl and NaOH solutions to study the corrosion behavior of the coating. As a control, a sample coated only with MoS2 particles by means of electrophoretic deposition was produced. The results show that the composite coating can be used in applications where copper is used for corrosion protection, with the addition of the desirable effects of its superhydrophobicity.
Highlights
The results show that the composite coating can be used in applications where copper is used for corrosion protection, with the addition of the desirable effects of its superhydrophobicity
Superhydrophobic surfaces have been widely studied in recent years due to their large variety of applications, and numerous methods have been developed for their fabrication
A simple composite electrodeposition setup was used to fabricate a composite coating of MoS2 particles in a copper matrix
Summary
Superhydrophobic surfaces have been widely studied in recent years due to their large variety of applications, and numerous methods have been developed for their fabrication. There are techniques that can be used to produce superhydrophobic surfaces in a one-step plasma treatments can be used for depositing low surface energy materials directly with a rough process. MMC gives gives the the possibility possibility of of using using particles particles of of aa low Regarding superhydrophobic superhydrophobic coatings, low surface energy material and, an additional second step of functionalization is not required. Different coatings have been developed employing MoS2 and other TMC particles in a metal matrix, such as nickel, chromium or copper. McGovern et al [19] studied the stability of MoS2 in contact with a copper matrix and confirmed that these coatings are stable, and the particles do not react with the copper matrix This aspect is very important when choosing a combination of materials for a composite structure. We could evaluate the corrosion behavior of a sample coated only with MoS2 particles, a sample coated only with copper, and we compared the behavior of the Cu or MoS2 coatings to the Cu–MoS2 composite coating
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