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首页> 外文期刊>Journal of Materials Engineering and Performance >The Inhibition Effect of Synthesized 4-Hydroxybenzaldehyde-1,3propandiamine on the Corrosion of Mild Steel in 1 M HCl
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The Inhibition Effect of Synthesized 4-Hydroxybenzaldehyde-1,3propandiamine on the Corrosion of Mild Steel in 1 M HCl

机译：合成的4-羟基苯甲醛-1,3丙二胺对1M HCl中低碳钢腐蚀的抑制作用

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摘要

The corrosion inhibition of mild steel in 1 M HCl by 4-hydroxybenzaldehyde-1,3propandiamine (4-HBP) has been investigated using potentiodynamic polarization, electrochemical impedance spectroscopy and chronoamperometry measurements. The experimental results suggest that this compound is an excellent corrosion inhibitor for mild steel and the inhibition efficiency increases with the increase in inhibitor concentration. Polarization curves reveal that this organic compound is a mixed-type inhibitor. The effect of temperature on the corrosion behavior of mild steel in 1 M HCl with the addition of the Schiff base was studied in the temperature range from 25 to 65℃. The experimentally obtained adsorption isotherms follow the Langmuir equation. Activation parameters and thermodynamic adsorption parameters of the corrosion process such as E_a, ΔH, ΔS, K_(ads), and ΔG_(ads) were calculated by the obtained corrosion currents at different temperatures and using the adsorption isotherm. The morphology of mild steel surface after its exposure to 1 M HCl solution in the absence and in the presence of 4-HBP was examined by AFM images.
机译：使用电位动力学极化，电化学阻抗谱和计时电流法测量，研究了4-羟基苯甲醛-1,3-丙二胺（4-HBP）在1 M HCl中对低碳钢的腐蚀抑制作用。实验结果表明，该化合物是一种优良的低碳钢缓蚀剂，其缓蚀效率随缓蚀剂浓度的增加而增加。极化曲线表明该有机化合物是混合型抑制剂。在25〜65℃温度范围内，研究了温度对低碳钢在1M HCl中添加席夫碱的腐蚀行为的影响。实验获得的吸附等温线遵循Langmuir方程。通过获得的在不同温度下的腐蚀电流并利用吸附等温线，计算了腐蚀过程的活化参数和热力学吸附参数，例如E_a，ΔH，ΔS，K_（ads）和ΔG_（ads）。通过AFM图像检查在不存在和存在4-HBP的情况下将其暴露于1M HCl溶液中后的低碳钢表面的形态。

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