曼尼希碱缓蚀剂在盐酸中对N80钢缓蚀性能

发布时间：2018-01-19 10:28

  本文关键词： 缓蚀剂 曼尼希碱 吸附 EIS SEM 缓蚀效率　出处：《表面技术》2017年01期 　论文类型：期刊论文

【摘要】：目的制备一种新型曼尼希碱缓蚀剂并研究其性能。方法利用失重法研究缓蚀剂缓蚀效率与缓蚀剂的质量浓度、盐酸质量分数、腐蚀温度、腐蚀时间的关系,确定缓蚀剂的吸附曲线。通过动电位极化曲线法和交流阻抗法研究缓蚀剂的综合性质。利用扫描电镜观察腐蚀前后N80钢片的表面形态。结果缓蚀剂缓蚀效率随缓蚀剂添加量的增大而增大,随测试温度的升高而下降,随盐酸质量分数的升高先增大后减小,随腐蚀时间的延长先增大后减小。60℃时,在质量分数为15%盐酸中浸入4 h、缓蚀剂添加量在1.0 g/L的条件下,缓蚀剂缓蚀效率为99.18%,腐蚀反应的活化能由56.34 k J/mol提高到了86.54 k J/mol。缓蚀剂在N80钢表面符合Langmiur吸附模型,吸附吉布斯自由能为-29.94 k J/mol。极化实验结果显示该缓蚀剂为以阴极抑制为主的混合型缓蚀剂。阻抗谱图显示添加缓蚀剂后,阻抗明显增大。扫描电镜结果显示缓蚀剂有效抑制了盐酸对N80钢片的腐蚀。结论所制备的缓蚀剂在质量分数为15%的盐酸中对N80钢片有良好的缓蚀效果。
[Abstract]:Objective to prepare a new type of Mannich base corrosion inhibitor and study its performance. Methods the relationship between corrosion inhibition efficiency and mass concentration of hydrochloric acid, mass fraction of hydrochloric acid, corrosion temperature and corrosion time was studied by weight loss method. The adsorption curve of corrosion inhibitor was determined. The comprehensive properties of corrosion inhibitor were studied by potentiodynamic polarization curve and AC impedance method. The surface morphology of N80 steel sheet before and after corrosion was observed by scanning electron microscope. Results corrosion inhibition efficiency of corrosion inhibitor was obtained. With the increase of the amount of corrosion inhibitor. With the increase of the test temperature, the content of hydrochloric acid increases first and then decreases. With the prolongation of corrosion time, it increases first and then decreases at .60 鈩，

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