Synergistic effect of tartaric acid with 2,6-diaminopyridine on the corrosion inhibition of mild steel in 0.5 M HCl

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作者：
Yujie Qiang
Lei Guo
Shengtao Zhang
Wenpo Li
Shanshan Yu
Jianhong Tan
机构：
[1] School of Chemistry and Chemical Engineering,
[2] Chongqing University,undefined
[3] School of chemical engineering,undefined
[4] Sichuan University of Science and Engineering,undefined
[5] National-municipal Joint Engineering Laboratory for Chemical Process Intensification and Reaction,undefined
[6] School of Materials and Chemical Engineering,undefined
[7] Tongren University,undefined
[8] School of Chemistry and Chemical Engineering,undefined
[9] Yangtze Normal University,undefined
来源：
Scientific Reports | / 6卷
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摘要：
The inhibitive ability of 2,6-diaminopyridine, tartaric acid and their synergistic effect towards mild steel corrosion in 0.5 M HCl solution was evaluated at various concentrations using potentiodynamic polarization measurements, electrochemical impedance spectroscopy (EIS), and weight loss experiments. Corresponding surfaces of mild steel were examined by atomic force microscope (AFM), field emission scanning electron microscope (FE-SEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS) analysis. The experimental results are in good agreement and reveal a favorable synergistic effect of 2,6-diaminopyridine with tartaric acid, which could protect mild steel from corrosion effectively. Besides, quantum chemical calculations and Monte Carlo simulation were used to clarify the inhibition mechanism of the synergistic effect.
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