Rosin imidazoline as an eco-friendly corrosion inhibitor for the carbon steel in CO2-containing solution and its synergistic effect with thiourea

编号 020031701

推送时间 20211115

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Rosin imidazoline as an eco-friendly corrosion inhibitor for the carbon steel in CO2-containing solution and its synergistic effect with thiourea

来源期刊 Journal of Molecular Structure

期 第317期

发表时间 20211021

关键词 Rosin;  Carbon steel;  Corrosion inhibitor;  DFT; 

摘要 Rosin is known as an eco-friendly raw material from natural plants. The main component of rosin is abietic acid. Abietic acid has a carboxyl and a tricyclic phenanthrene skeleton in which conjugated double bonds are present. Conjugation structure will lead to local enrichment of electrons, thereby creating sites that can be used for adsorption. In this case, it is expected that a better performance could be obtained if an inhibitor is synthesized from rosin. In this work, rosin was used to synthesize an imidazoline derivative as a corrosion inhibitor, then the corrosion inhibition performance and synergistic effect with thiourea (TU) of rosin imidazoline (RI) for carbon steel in test solution were studied using weight loss measurement, electrochemical techniques and surface characterization. The results show that the inhibition efficiency of RI reaches 83.8% at 200?mg/L. A further increase in RI concentration does not effectively improve the inhibition performance since the critical micelle concentration of RI is present at around 200?mg/L. The molecular characteristics of RI was analyzed by quantum chemical calculations. It clearly shows that multiple adsorption sites exists in the RI molecular structure, hence RI could offer a good inhibition performance. With the compounding of 200?mg/L RI and 10?mg/L TU, the inhibition efficiency could increase as high as 89.8%, demonstrating a good synergistic effect between RI and TU. The corresponding synergistic mechanisms are also proposed.

服务人员 尚玮姣

服务院士 宋湛谦

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