Singh Ambrish, Ansari K R, Xu Xihua, Sun Zhipeng, Kumar Ashok, Lin Yuanhua
School of Materials Science and Engineering, Southwest Petroleum University, Chengdu, 610500, Sichuan, China.
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan, 610500, China.
Sci Rep. 2017 Nov 2;7(1):14904. doi: 10.1038/s41598-017-13877-0.
The influence of a Schiff base namely N,N'-(pyridine-2,6-diyl)bis(1-(4-methoxyphenyl) methanimine) (PM) on the corrosion of J55 and N80 steel in 3.5 wt.% NaCl solution saturated with CO was evaluated using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD), contact angle, scanning electron microscopy (SEM), atomic force microscopy (AFM) and scanning electrochemical microscopy (SECM). Potentiodynamic polarization results suggested that the inhibitor acted as a mixed type inhibitor by reducing both anodic and cathodic reactions. The adsorption of PM on the J55 and N80 steel surface obeyed the Langmuir adsorption isotherm. XRD, contact angle, SEM, AFM and SECM studies revealed that the surface of the metal was quite unaffected after the addition of inhibitor. Quantum chemical calculations and molecular dynamic simulation support the experimental results well.
通过失重法、动电位极化法、电化学阻抗谱（EIS）、X射线衍射（XRD）、接触角测量、扫描电子显微镜（SEM）、原子力显微镜（AFM）和扫描电化学显微镜（SECM），评估了席夫碱N,N'-（吡啶-2,6-二基）双（1-（4-甲氧基苯基）甲亚胺）（PM）对J55和N80钢在饱和CO的3.5 wt.% NaCl溶液中的腐蚀影响。动电位极化结果表明，该缓蚀剂通过降低阳极和阴极反应，起到混合型缓蚀剂的作用。PM在J55和N80钢表面的吸附符合朗缪尔吸附等温线。XRD、接触角测量、SEM、AFM和SECM研究表明，添加缓蚀剂后金属表面未受明显影响。量子化学计算和分子动力学模拟很好地支持了实验结果。
