Effect of yttria and benzotriazole doping on wear/corrosion responses of alumina-based nanostructured films. Issue 16 (November 2018)

• Record Type: Journal Article
• Authors: Dezfuli, Saeid Mersagh; Sabzi, Masoud
• Is Part Of: Ceramics international. Volume 44:Issue 16(2018)
• Page Start: 20245
• Page End: 20258
• Publication Date: 2018-11
• Subjects: Alumina-based nanostructured films -- Yttria and benzotriazole doping -- Abrasion/corrosion behaviour -- Sol-gel. ‎; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.07.313
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this study, the effect of yttria and benzotriazole doping on abrasion/corrosion properties of ‎ alumina-based nanostructured films has been investigated. Single-component alumina, double-component alumina-yttria, and triple-component alumina-yttria-benzotriazole ceramic-based films have been ‎layer-deposited over St52 steel surface by the sol-gel process in order to improve the abrasion and corrosion behaviour of this steel. Afterwards, phase analysis, morphology, and topography of these films have ‎been carried out respectively by Grazing Incidence X-ray Diffraction (GIXRD), Field Emission Scanning ‎Electron Microscopy (FE-SEM), and Atomic Force Microscopy (AFM). Moreover, in order to investigate ‎elemental distribution in layer-deposited films, Energy Dispersive Spectroscopy (EDS) and MAP analysis ‎were performed. In order to investigate the abrasion behaviour of films and substrates under ‎investigation, a ball-on-disc method was utilized. Also, the corrosion behaviour of under-investigation films ‎and substrate were studied using electrochemical impedance spectroscopy and potentiodynamic ‎polarization for 1, 48, and 96 h of immersion in 3.5 wt%NaCl solution. GIXRD results revealed the ‎amorphous nature of the films and the absence of formation of crystalline structure. AFM and FE-SEM ‎observations revealed intactness of double-component alumina-yttria and alumina-yttria-benzotriazole ‎films in comparison with single component alumina film. Also as per the results of electrochemical ‎tests, it was observed that the presence of yttria and benzotriazole in alumina ceramic-based films ‎results in the severe increase in the corrosion resistance of such films by activation of self-healing ‎reactions and formation of passive layers. Moreover, the abrasion test results showed that doping of yttria ‎and benzotriazole results in increasing abrasion resistance and reducing friction coefficient in alumina ‎ceramic-based films.‎