Adsorption and corrosion inhibition performance of two planar rigid pyridinecarboxaldehyde-based double Schiff bases for mild steel in HCl solution: Experimental and computational investigations
作者:Xiao-Long Li、Bin Xie、Chuan Lai、Jian-Shen Feng、Xiao-Qiang Liu、Luo Chen、Yu-Geng Yang、Run-Wu Ji、Jia-Yu He、Wei Li、Meng-Nan Liu
DOI:10.1016/j.molliq.2022.118926
日期:2022.6
Two planar rigid double Schiff bases, (1E,1′E)-N,N’-(1,4-phenylene)bis(1-(pyridin-2- yl)methanimine) (PBPM2) and (1E,1′E)-N,N’-(1,4-phenylene)bis(1-(pyridin-3-yl)methan- imine) (PBPM3), were investigated as corrosion inhibitors for mild steel in HCl solution. The experimental results presented that the inhibition efficiencies in 1.0 mol L−1 HCl slightly negatively correlate with temperature, while
两个平面刚性双席夫碱,(1E,1'E)-N,N'-(1,4-亚苯基)双(1-(吡啶-2-基)甲亚胺) (PBPM2) 和 (1E,1'E )-N,N'-(1,4-phenylene)bis(1-(pyridin-3-yl)methanimine) (PBPM3) 作为低碳钢在 HCl 溶液中的缓蚀剂进行了研究。实验结果 表明,1.0 mol L -1 HCl的抑制效率与温度呈轻微负相关,而与抑制剂浓度和浸泡时间呈正相关。30℃失重测定得到的PBPM2和PBPM3的最大抑制率分别达到91.88%和92.18%。拟合分析表明,PBPM2和PBPM3符合Langmuir吸附等温线,物理化学吸附机理为 低碳钢的表面。动电位极化测量表明PBPM2和PBPM3是具有阳极特性的混合型抑制剂。接触角和能量色散光谱数据表明,PBPM2和PBPM3在HCl溶液中的作用改变了低碳钢表面的疏水性,从而在金属表面形