Microstructure and corrosion behavior of electrodeposited Zn‐TiN composite coatings

Abstract

In this paper, the pure Zn coating and Zn‐TiN composite coatings containing four different concentrations of TiN particles were prepared on the carbon steel by direct current electrodeposition. The X‐ray diffraction and scanning electron microscopy were used to study the crystal size, preferred orientation, and surface morphology of these coatings. The results show that the incorporation of TiN particles refines the crystal size of the Zn coating and results in the formation of a special surface morphology with papillary‐shaped clusters structure that preferentially grows along the (100) crystallographic plane. Such a surface provides better hydrophobicity for the Zn‐TiN composite coatings. The corrosion behavior of these coatings was evaluated by potentiodynamic polarization, electrochemical impedance spectroscopy and the long‐term immersion test. The results show that the incorporation of TiN nanoparticles leads to a significant increase in corrosion resistance of the Zn coating and there is an optimal addition of TiN nanoparticles to provide a best corrosion resistance for the composite coatings. Additionally, the microhardness of prepared coatings was also evaluated.

Advances in organic adsorption on hydrophilic hierarchical structures for bionic superhydrophobicity: from fundamentals to applications

“…40,203 Khorsand et al reported that the superhydrophobic Ni–Co coating with a micro-/nanoflower-like structure was fabricated on a copper substrate by electrodeposition, and the Ni–Co coating became superhydrophobic after exposure of the surface to air for two weeks. 204,205 Sheng et al prepared Zn–TiN composite coatings of papillary-shaped cluster structure with a length of about 4–8 μm on the steel substrate by electrodeposition, 206 and Xu et al prepared Ni–Mo–SiC–TiN nanocomposite coatings with spherical and columnar structures on an aluminum alloy via pulse electrodeposition. 207 During this electrodeposition process, the dispersed nanoscale SiC and TiN particles are adsorbed by Ni and Mo ions, which were transported to the cathode substrate.…”

“…204,205 Sheng et al prepared Zn-TiN composite coatings of papillary-shaped cluster structure with a length of about 4-8 mm on the steel substrate by electrodeposition,206 and Xu et al prepared Ni-Mo-SiC-TiN nanocomposite coatings with spherical and columnar structures on an aluminum alloy via pulse electrodeposition 207. During this electrodeposition process, the dispersed nanoscale SiC and TiN…”

Deposition characteristics, microstructure and wear behaviour of Co–WC composite coatings

“…However, high cost and shortage of resources have become the bottleneck restricting its further development. In recent years, the preparation of cermet composite coatings on the surface of cheap materials has become a research hotspot because it can endow cheap materials with excellent properties comparable to cemented carbide [2][3][4][5][6][7][8]. There are various routes to preparing cermet composite coating.…”