杨秀芳,唐敏敏,马养民.曼尼希碱缓蚀剂在盐酸中对N80钢缓蚀性能[J].表面技术,2017,46(1):175-181.
YANG Xiu-fang,TANG Min-min,MA Yang-min.Mannich Base as Corrosion Inhibitor for N80 Steel in HCl Solution[J].Surface Technology,2017,46(1):175-181
曼尼希碱缓蚀剂在盐酸中对N80钢缓蚀性能
Mannich Base as Corrosion Inhibitor for N80 Steel in HCl Solution
投稿时间:2016-07-15  修订日期:2017-01-20
DOI:10.16490/j.cnki.issn.1001-3660.2017.01.028
中文关键词:  缓蚀剂  曼尼希碱  吸附  EIS  SEM  缓蚀效率
英文关键词:corrosion inhibitor  Mannich base  adsorption  EIS  SEM  corrosion inhibition efficiency
基金项目:陕西省教育厅重点实验室项目(15JS012)
作者单位
杨秀芳 陕西科技大学化学与化工学院 教育部轻化工助剂化学与技术重点实验室,西安710021 
唐敏敏 陕西科技大学化学与化工学院 教育部轻化工助剂化学与技术重点实验室,西安710021 
马养民 陕西科技大学化学与化工学院 教育部轻化工助剂化学与技术重点实验室,西安710021 
AuthorInstitution
YANG Xiu-fang Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science &Technology, Xi'an 710021,China 
TANG Min-min Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science &Technology, Xi'an 710021,China 
MA Yang-min Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science &Technology, Xi'an 710021,China 
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中文摘要:
      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 kJ/mol提高到了86.54 kJ/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 kJ/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。
英文摘要:
      The work aims to prepare a novel Mannich base inhibitor and study its performance. The relationship among corrosion efficiency of corrosion inhibitor and mass concentration of corrosion inhibitor, mass fraction of hydrochloric acid, corrosion temperature and corrosion duration was studied by weight loss method. Adsorption curve of the corrosion inhibitor was verified. Comprehensive properties of the corrosion inhibitor were studied by electrochemical impedance spectroscopy and scanning electron microscopy. The surface morphology of N80 sheet steel was observed by SEM. Efficiency of the inhibitor increased as addition of the inhibitor increased, decreased as temperature increased, increased firstly and then decreased as the HCl concentration and corrosion time increased. At 60 ℃, the efficiency of corrosion inhibitor was 99.18 % provided that it was immersed in 15% HCl for 4 h and 1.0 g/L of inhibitor was added. The activation energy of corrosion reaction increased from 56.34 kJ/mol to 86.54 kJ/mol. The adsorption of inhibitor on N80 steel surface followed the Langmuir adsorption isotherm model. −29.94 kJ/mol of Gibbs free energy was absorbed. The obtained results of polarization experiment indicated that the inhibitor acted as a mixed-type inhibitor mainly featuring in cathodal depression. The SEM observations showed that the corrosion inhibitor can inhibit corrosion of N80 sheet steel effectively. The inhibitor prepared provides good corrosion inhibition effects for N80 sheet steel in 15% HCl solution.
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