Natural chitosan-based carbon dots as an eco-friendly and effective corrosion inhibitor for mild steel in HCl solution

Deshuai Zhen; Shaoqi Zhang; Xinyu Zhang; Hongjian Zhang; Jue Wang; Bo Chen; Yali Liu; Xiaohu Luo

doi:10.1016/j.ijbiomac.2023.126449

Natural chitosan-based carbon dots as an eco-friendly and effective corrosion inhibitor for mild steel in HCl solution

Int J Biol Macromol. 2023 Dec 31;253(Pt 2):126449. doi: 10.1016/j.ijbiomac.2023.126449. Epub 2023 Aug 24.

Authors

Deshuai Zhen¹, Shaoqi Zhang², Xinyu Zhang², Hongjian Zhang³, Jue Wang⁴, Bo Chen³, Yali Liu³, Xiaohu Luo⁵

Affiliations

¹ School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, PR China; Engineering Research Center of Loss Efficacy and Anticorrosion of Materials of Guizhou, School of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, Duyun, Guizhou 558000, PR China; State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, PR China.
² School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, PR China; State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, PR China.
³ State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, PR China.
⁴ Engineering Research Center of Loss Efficacy and Anticorrosion of Materials of Guizhou, School of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, Duyun, Guizhou 558000, PR China. Electronic address: wangjue2022@163.com.
⁵ Engineering Research Center of Loss Efficacy and Anticorrosion of Materials of Guizhou, School of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, Duyun, Guizhou 558000, PR China; State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, PR China. Electronic address: luoxiaohu4812350@163.com.

PMID: 37633561
DOI: 10.1016/j.ijbiomac.2023.126449

Abstract

Polysaccharide chitosan and L-histidine were applied to synthesize chitosan-based carbon dots (CA-CDs) by a simple laser ablation method. After characterization of the CA-CDs by FT-IR, UV-vis, Raman, XRD, TEM, and XPS, the CA-CDs were introduced as an eco-friendly and high-performance corrosion inhibitor for mild steel (MS) in 1.0 M HCl solution. The inhibition action and mechanism of CA-CDs were determined by weight loss and electrochemical measurements, in combination with SEM, AFM, and XPS. The results show that CA-CDs as mixed-type inhibitors could effectively weaken the corrosion of MS in 1.0 M HCl solution, and their maximum inhibition efficiency reaches 97.4 % at 40 mg L^-1. The adsorption behavior of CA-CDs well obeys the Langmuir adsorption isotherm containing both chemisorption and physisorption. The chemisorption mainly results from the multiple adsorption sites in the CA-CDs, and the physical adsorption is due to the blocking and barrier effect of CA-CD nanoparticles. Both adsorption behaviors were proposed to elucidate the corrosion inhibition mechanism of CA-CDs.

Keywords: Chemisorption; Chitosan; Corrosion inhibitor; Electrochemical measurement.

MeSH terms

Carbon
Chitosan* / chemistry
Corrosion
Spectroscopy, Fourier Transform Infrared
Steel / chemistry
Surface Properties

Substances

Chitosan
Steel
Carbon