Experimental and theoretical evaluation of two pyridinecarboxaldehyde thiosemicarbazone compounds as corrosion inhibitors for mild steel in hydrochloric acid solution
Experimental and theoretical evaluation of two pyridinecarboxaldehyde thiosemicarbazone compounds as corrosion inhibitors for mild steel in hydrochloric acid solution
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DOI：
10.1016/j.corsci.2013.10.007
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发表时间：
2014
影响因子：
8.3
通讯作者：
Bing Xu;Wenzhong Yang;Y. Liu;Xiaoshuang Yin;Weinan Gong;Yizhong Chen
中科院分区：
文献类型：
--
作者：
Bing Xu;Wenzhong Yang;Y. Liu;Xiaoshuang Yin;Weinan Gong;Yizhong Chen
The inhibition effect of two Schiff’s base derivatives on the corrosion of mild steel in 1.0 M HCl solution was studied by electrochemical techniques, SEM and theoretical calculation methods. The experimental results show that the inhibition efficiency of 2-pyridinecarboxaldehyde thiosemicarbazone (2-PCT) is higher than that of 4-pyridinecarboxaldehyde thiosemicarbazone (4-PCT), and both the two compounds are good inhibitors for mild steel in 1.0 M HCl. Potentiodynamic polarization curves show that the two inhibitors act as mixed type inhibitors. The adsorption of inhibitors obeys the Langmuir adsorption isotherm, and the thermodynamic parameters (E a, K ads, Δ G ads 0) were calculated and discussed. The mechanism of inhibition was determined by PZC measurements and theoretical calculation methods.
