Chitosan derivative corrosion inhibitor for aluminum alloy in sodium chloride solution: A green organic/inorganic hybrid. (1st August 2021)

• Record Type: Journal Article
• Authors: Lai, Xin; Hu, Jianfeng; Ruan, Tao; Zhou, Jianhui; Qu, Jinqing
• Is Part Of: Carbohydrate polymers. Volume 265(2021)
• Publication Date: 2021-08-01
• Subjects: Organic/inorganic hybrid -- Green corrosion inhibitor -- Aluminum alloy -- Schiff base -- EIS; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2021.118074
• Languages: English
• ISSNs: 0144-8617

Abstract

Graphical abstract: Highlights: CPT is an organic/inorganic hybrid corrosion inhibitor for aluminum alloy. CPT is a mixed-type inhibitor which mainly restrains the cathodic process. The maximum inhibition efficiency of CPT reaches to 94.5 %. The suitable corrosion mechanism of CPT is clarified. Abstract: A novel and eco-friendly chitosan derivative was synthesized as green corrosion inhibitors on C3003 aluminum alloy in 3.5 wt.% NaCl solution. In this paper, CP was prepared by Schiff Base reaction with chitosan and 4-pyridinecarboxaldehyde. Then, TiO2 was dispersed in CP to prepare CPT nanocomposite. The corrosion inhibition effect of CPT on C3003 aluminum alloy at different concentrations were studied with electrochemical techniques and surface analysis. The results showed that the maximum inhibition efficiency of CPT nanocomposite reaches to 94.5 % at 200 ppm after the immersed in 3.5 wt.% NaCl solution for 72 h. Meanwhile, the contact angle increases to 120° due to the formation of hydrophobic substances. The strategy of organic/inorganic hybrid can provide the inspiration for the development of chitosan corrosion inhibitor with low concentration and high efficiency.