Inhibition Behavior of an Imidazoline Inhibitor for Carbon Steel in a Supercritical CO2/H2O System
Inhibition Behavior of an Imidazoline Inhibitor for Carbon Steel in a Supercritical CO2/H2O System
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超临界 CO2/H2O 体系中咪唑啉缓蚀剂对碳钢的缓蚀行为
DOI：
10.1149/2.0151712jes
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发表时间：
2017-08
影响因子：
3.9
通讯作者：
Guo Xingpeng
中科院分区：
文献类型：
--
作者：
Wei Lisha;Chen Zhenyu;Guo Xingpeng
通过失重测定、电化学测试和表面分析，研究了合成的咪唑啉缓蚀剂在超临界CO2-H2O体系中对碳钢的缓蚀作用。在咪唑啉缓蚀剂存在下，在非超临界CO2条件下，随着CO2分压的增加，腐蚀速率和腐蚀过程变化不大，而在超临界CO2条件下，腐蚀速率明显增加，腐蚀过程有很大不同。KI的引入大大降低了超临界CO2条件下的腐蚀速率。随着CO2分压增加到超临界状态，碳钢表面过剩电荷由负电荷变为正电荷，阻碍了咪唑啉缓蚀剂的吸附，从而降低了缓蚀剂的缓蚀效率。
The inhibition effect of a synthesized imidazoline inhibitor on carbon steel in a supercritical CO 2-H 2 O system was investigated using weight loss measurement, electrochemical tests, and surface analyses. In the presence of the imidazoline inhibitor, the corrosion rate and corrosion process showed minimal change with increasing CO 2 partial pressure under non-supercritical CO 2 conditions, whereas the corrosion rate clearly increased and the corrosion process greatly differed when the supercritical CO 2 condition was reached. The introduction of KI substantially decreased the corrosion rate in the supercritical CO 2 condition. The excess surface charge of the carbon steel changed from negative to positive as the partial pressure of CO 2 increased to the supercritical condition, thereby hindering the adsorption of imidazoline inhibitor, which in turn decreased the inhibition efficiency.
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