Anti-Corrosion and Tribo-Mechanical Properties of Co-deposited Zn–SnO2 Composite Coating

Abstract

Zn-SnO 2 composite coatings were prepared by direct potential using electrolytic co-deposition technique from sulfate solution. The effect of Zn 2? and SnO 2 concentrations in deposited bath on the mechanical properties and morphological characteristics of the composite coatings were examined. The characterizations of the sample were analyzed using scanning electron microscopy couple with energy dispersive spectroscopy (SEM/EDS), X-ray diffraction (XRD) and atomic force microscopy (AFM). The electrochemical degradation behavior of the samples in 3.65 wt.% NaCl solution was studied using potentiodynamic polarization technique and characterized by high-resolution optical microscope. From all the fabricated composite coatings, obvious diffraction peaks were observed with Zn-7Sn-S-0.3V film with Zn 2 Sn 7 , Sn, Zn 2 Sn 5 and Zn phases, confirming the presence and formation of Zn-SnO 2 coating. The XRD pattern shows that the presences of SnO 2 particle remarkably play a major role in the precipitation and orientation of the alloy matrix. From the SEM/EDS and AFM results, the deposits show that composite particle and proper bath composition have strong influence on the microstructure. An enhanced corrosion resistance was attained as a result of the induced particles.

Fabrication and Properties of Zinc Composite Coatings for Mitigation of Corrosion in Coastal and Marine Zone

“…The particles were also found to have no chemical interaction with the matrix, and the particle content in the coating was subject to the concentration of the particle in the plating bath. However, [51] reported formation of Zn x Sn x phases when SnO 2 was codeposited with Zn. The chemical interaction observed in this work may be due to the change in operating parameters and bath formulations.…”

“…The development of composite coatings also aims at improving this property to extend the applications of the coatings. The inclusion of reinforcement particles hinder plastic deformation due to the dispersive strengthening effect exhibited by the particles [51]. The authors also reported that the alteration of microstructure and strengthening of the coatings by formation of compact and crack-free coating add to the minimization of friction due to the presence of embedded particles The particles also form a protective barrier between the matrix and the wearing medium, thus reducing direct contact and friction coefficient [53].…”

Mechanical and opto-electrical response of embedded smart composite coating produced via electrodeposition technique for embedded system in defence application

“…Their usage in various industrial sectors as protective coating for large quantities of metal products and other fabricated ferrous metallic parts are enormous [13]. The service life of zinc coating can be enhanced by addition of inert materials into its coating during bath preparation [14]. This inclusion promotes advantageous characteristics for special applications such as semi-conductor, embedded system, defence and optoelectronic components [15,16].…”

Microstructure and corrosion behavior of electrodeposited Zn‐TiN composite coatings

“…At present, the second‐phase particles that are used to prepare the zinc‐based composite coatings are mainly metal or non‐metal oxides which are easily incorporated into the matrix. These reported oxides include SiO 2, CuO, V 2 O 5, ZnO, Al 2 O 3, ZrO 2, TiO 2, CeO 2 , SnO 2 , etc. The corrosion current densities for zinc coatings incorporated by these oxide particles were shown to be obviously lower than that of pure zinc coating and were in the range of half to one third of the intrinsic corrosion current density of pure zinc coating.…”