Preparation and corrosion resistance of ZnO/CeO₂ composite films

Abstract

Zinc oxide/cerium oxide (ZnO/CeO 2 ) composite films were fabricated on zinc surfaces by electrochemical oxidation at different current densities. Scanning electron microscopy and X-ray photoelectron spectroscopy were used to investigate the surface compositions and morphologies of the films. Corrosion resistance was analysed using polarisation curves, open-circuit potential and electrochemical impedance spectroscopy. The X-ray photoelectron spectra showed that the films were composed of ZnO and CeO 2 . Evaluation of corrosion revealed that the samples with composite films had lower corrosion rates. On the basis of these findings, ZnO/CeO 2 composites have potential as anticorrosion films for zinc.

Self-healing conversion coating with gelatin–chitosan microcapsules containing inhibitor on AZ91D alloy

“…Figure 1(a) shows that the different polygon shaped micro crack pieces are uniformly distributed in the conversion coating without microcapsules. The micro crack may be caused by the stress release during the process of conversion coating treatment, which can be easily seen in previous works [4][5][6].…”

“…Figure 1(a) shows that the different polygon shaped micro crack pieces are uniformly distributed in the conversion coating without microcapsules. The micro crack may be caused by the stress release during the process of conversion coating treatment, which can be easily seen in previous works [4-6]. From Figure 1(b), many microcapsules are distributed in the region of cracks, and most of the microcapsules are about 30–50 µm in diameter.…”

“…One of the biggest disadvantages of magnesium and its alloys is their poor corrosion resistance in even mild environments, which seriously limits their applications in diverse fields [2][3][4]. Magnesium alloys are chemically reactive materials and liable to suffer severe corrosion in almost all industrial environments during service, which seriously limits their potential application in industrial practice [5][6][7]. One of the easiest ways to improve the corrosion resistance of magnesium alloy is with a chemical conversion coating [1].…”

Synthesis, Crystallography, Microstructure, Crystal Defects, Optical and Optoelectronic Properties of ZnO:CeO2 Mixed Oxide Thin Films

“…Previous works have reported that co-deposition of mixed metal oxides such as ZnO:CeO 2 could yield mixtures of exceptional properties such as high UV absorption, controllable optical band gap, good photoluminescence, high extinction coefficient, anticorrosive properties and high refractive index [28]. In recent years, ZnO:CeO 2 mixed oxides thin films have been used for essential applications, such as sensors [29,30], catalysts [31,32], fuel cells applications [33], antibacterial applications [34], corrosion protective coating [35], and UV filters [36].…”