2-Mercaptobenzothiazole as a corrosion inhibitor for carbon steel in supercritical CO2-H2O condition
2-Mercaptobenzothiazole as a corrosion inhibitor for carbon steel in supercritical CO2-H2O condition
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2-巯基苯并噻唑在超临界 CO2-H2O 条件下作为碳钢缓蚀剂
DOI：
10.1016/j.apsusc.2019.01.113
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发表时间：
2019-05-15
影响因子：
6.7
通讯作者：
Guo, Xingpeng
中科院分区：
文献类型：
--
作者：
Cen, Hongyu;Cao, Jiaojiao;Guo, Xingpeng
采用失重法、表面分析法、电化学测试法和量子化学计算法研究了2-巯基苯并噻唑（MBTH）在CO2 -H2O体系中对碳钢的缓蚀性能。结果表明，MBTH能有效地保护碳钢免受CO2腐蚀，且在超临界CO2条件下的缓蚀效率高于非超临界CO2条件下的缓蚀效率。微分电容曲线表明，在超临界CO2体系中，碳钢表面会积累过量的正电荷，而在非超临界CO2体系中，碳钢表面会积累大量的负电荷。提出了吸附模型来解释MBTH的缓蚀机理。
The corrosion inhibition performance of 2-mercaptobenzothiazole (MBTH) for carbon steel in a CO2 -H2O system was investigated by weight loss, surface analysis, electrochemical measurements, and quantum chemical calculations. Results showed that MBTH could effectively protect carbon steel from CO2 corrosion and inhibition efficiency of MBTH in supercritical CO2 was higher than that in non-supercritical CO2 situation. The differential capacitance curves revealed that excess positive charges would be on the surface of carbon steel in the supercritical-CO2 system while negative charges accumulated on carbon steel surface in non-supercritical CO2 condition. The adsorption model was proposed to explain the inhibition mechanism of MBTH.