| HE Sha-sha,HAN Xin-fu,LAI Xi-xiang,GONG Xing-hou,WU Chong-gang,CEN Hong-yu.Research Progress on Corrosion Inhibitor and Inhibition Mechanism Against CO2 Corrosion of Carbon Steel[J],52(7):117-129 |
| Research Progress on Corrosion Inhibitor and Inhibition Mechanism Against CO2 Corrosion of Carbon Steel |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.07.009 |
| KeyWord:corrosion inhibitor CO2 corrosion corrosion mechanism synergistic effect |
| Author | Institution |
| HE Sha-sha |
School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan , China |
| HAN Xin-fu |
Xiamen Jiuan Security Test & Evaluation of Office Co., Ltd., Fujian Xiamen , China |
| LAI Xi-xiang |
Xiamen Jiuan Security Test & Evaluation of Office Co., Ltd., Fujian Xiamen , China |
| GONG Xing-hou |
School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan , China |
| WU Chong-gang |
School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan , China |
| CEN Hong-yu |
School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan , China |
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| Abstract: |
| CO2 corrosion and protection proposed by researchers have attracted extensive attention in industry. Given the low cost and easy operation, the injection of corrosion inhibitor is one of the most effective methods to inhibit metal corrosion. Most of the corrosion inhibitors that have been put into use or reported to inhibit CO2 corrosion are organic reagents, including imidazoline and its derivatives, alkyl surfactants, quaternary ammonium salts, organic amines, Schiff bases and composite compositions. The latest research progress of CO2 corrosion inhibitor has been summarized and analyzed from five parts:the synthesis and preparation of new CO2 corrosion inhibitor, the development of green inhibitors composed of animal and plant components inhibiting the CO2 corrosion, the synergistic effect of CO2 corrosion inhibitor, the inhibition performance of corrosion inhibitor in harsh environment, and the structure-activity relationship of corrosion inhibitor and the evaluation of affecting factors. In view of the problems such as insufficient performance and large pollution of some existing corrosion inhibitors, the preparation of CO2 corrosion inhibitor mainly includes the synthesis of new corrosion inhibitor molecules, the extraction of green corrosion inhibitors and the synergism of different inhibitors. The heterocyclic molecules are mainly used as raw materials in organic synthesis of new corrosion inhibitors from structural design, functional group grafting or modification. Meanwhile, the frontier development and challenges of nano corrosion inhibitors with different dimensions are also introduced comprehensively. Nano inhibitor is an extension of traditional theory of corrosion inhibitor, but there are also bottleneck problems in the stability and durability of inhibition performance owing to the high reactivity of nanoparticles, and the brief analysis is generalized in this study. In view of the rapid development of green corrosion inhibitors, plant extracts and extracted compounds from secondary chemical reaction should be improved in the control of green concept for the "whole process", and the green definition standard should be established. The recycling of organic solvents used in the extraction process and the post-treatment of residues after extraction are the challenges faced in the practical industrial application, but there is still a lack of specific solutions. To study the synergistic effect of corrosion inhibitors, it is necessary to establish a rapid evaluation system and improve the guiding theory to explore the best compound ratio, which is adopted to clarify the essential mechanism of synergism between different corrosion inhibitors. Although the theoretical calculation has been applied in a wide range of reports, at present, quantum chemistry is only used as a means combined with experiments to verify the results in the research of corrosion inhibitors, and the purpose of guiding design and theoretical prediction has not been fully implemented. Under complex or extreme working conditions, attention should be paid to the stability of corrosion inhibitor structure, the durability of corrosion inhibition performance and the change of corrosion inhibition mechanism, and the demand for developing "anti-corrosion +" multifunctional inhibitor has been increased by industry. Attentively, the special environment also brings challenges to the stability, adsorption performance and synergistic effect of corrosion inhibitor, which still needs to be further explored. When the working conditions such as temperature, partial pressure of CO2 and flow rate change, the corrosion inhibitor will undergo the process of hydrolysis and protonation, and the adsorption law may change correspondingly. In addition, both the formation time and state of corrosion product film and the change of critical micelle concentration caused by chain length of inhibitor also affect the actual performance of inhibitor. The challenges and development trend of CO2 corrosion inhibitor have been described briefly. |
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