β-cyclodextrin modified xanthan gum as an eco-friendly corrosion inhibitor for L80 steel in 1 M HCl

• Published in: Cellulose (London) Vol. 28; no. 17; pp. 11133 - 11152
• Main Authors: Cao, Yixuan, Zou, Changjun, Wang, Chengjun, Liang, Hao, Lin, Shuai, Liao, Ya, Shi, Lihong
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.11.2021; Springer Nature B.V
• Subjects: Adsorption; anodes; Anodic dissolution; Bioorganic Chemistry; biopolymers; cellulose; Ceramics; Chemisorption; Chemistry; Chemistry and Materials Science; Composites; Corrosion; Corrosion effects; Corrosion inhibitors; Corrosion mechanisms; Cyclodextrins; Dissolution; electrochemistry; Fourier transform infrared spectroscopy; Fourier transforms; Glass; Hydrochloric acid; Hydrogen chloride; Infrared analysis; Infrared spectroscopy; Medium carbon steels; Natural Materials; Natural polymers; Organic Chemistry; Original Research; Photoelectrons; Physical Chemistry; Polymer Sciences; sorption isotherms; Spectrum analysis; steel; Surface analysis (chemical); Surface chemistry; Sustainable Development; Technology assessment; X ray photoelectron spectroscopy; Xanthan; xanthan gum; Xanthan gum; β-Cyclodextrin; Inhibitor; Grafted polymer; Adsorption
• ISSN: 0969-0239; 1572-882X
• DOI: 10.1007/s10570-021-04240-8

The development of eco-friendly corrosion inhibitors is a subject of several investigations, especially natural polymers. Aimed at suppressing the corrosion of L80 steel in 1 mol/L hydrochloric acid (HCl), a novel natural polymer inhibitor was developed based on xanthan gum (XG) and β-Cyclodextrin (β-CD) in this work. The corrosion inhibition effect of β-cyclodextrin modified xanthan gum (β-CD-XG) on L80 steel was evaluated by electrochemical methods, and surface analysis technology. Adsorption isotherm studies, Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) were used to explore the corrosion inhibition mechanism of β-CD-XG on L80 steel. The results suggested that β-CD-XG was classified as a mixed-type inhibitor, and mainly suppressed the anode metal dissolution by a tight adsorption film. The formation of the film was attributed to the chemisorption of –OH, –COO-, –CH 2 –O–, and –CH 2 –O–CH 2 – groups on the surface of L80 steel, which conformed to the Langmuir adsorption model. The experimental results illustrated that the maximum corrosion inhibition efficiency of 94.74% was acquired at 200 mg/L β-CD-XG at 293 K. Graphic abstract