Cerium oxide loaded with Gum Arabic as environmentally friendly anti-corrosion additive for protection of coated steel. (15th January 2021)

• Record Type: Journal Article
• Authors: Nawaz, Muddasir; Shakoor, R.A.; Kahraman, Ramazan; Montemor, M.F.
• Is Part Of: Materials & design. Volume 198(2021)
• Publication Date: 2021-01-15
• Subjects: Ceria -- Coatings -- Corrosion inhibition -- Steel -- Gum Arabic; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2020.109361
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: The depreciation of assets and safety threats because of corrosion has forced to develop eco-friendly and smarter corrosion protection strategies. In this study, natural Gum Arabic (GA) was used as a corrosion inhibitor and loaded into cerium oxide nanoparticles (CONPs) to develop an environment-friendly additive for corrosion protection of coated steel in the marine environment. This additive was uniformly dispersed into an epoxy formulation that was used to protect steel plates. Epoxy coatings containing CONPs, without GA, were also prepared as reference. High-Resolution Transmission Electron Microscopy (HR-TEM) and Fourier Transform infrared spectroscopy (FTIR) revealed the successful loading of GA into the CONPs. Thermogravimetric analysis (TGA) and Brunauer-Emmett-Teller (BET) techniques confirmed approximately ⁓30.0 wt% loading of GA into the CONPs. Electrochemical impedance spectroscopy (EIS) demonstrated the anticorrosion properties of the epoxy coatings modified with the GA loaded CONPs when compared to reference coatings. The corrosion protection mechanism postulates that GA loaded CONPs act as a filler material for epoxy coating and it can also aid the recovery of the protective properties of the epoxy coating leading to the formation of a stable protective layer. Graphical abstract: Unlabelled Image Highlights: Environmentally friendly Anticorrosive pigments (CeO2 loaded with Gum Arabic) were added in coating for corrosion protection of steel. The anti-corrosive pigments were characterized by different techniques and confirmed the loading of Gum Arabic into CeO2 . Improved anti-corrosion properties of coated samples were evidenced by Electrochemical Impedance Spectroscopy (EIS) techniques. The Corrosion inhibition mechanism suggests that Gum Arabic delays coating degradation and adsorbs on steel substrate to form a protective layer.