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材料工程  2019, Vol. 47 Issue (2): 122-128    DOI: 10.11868/j.issn.1001-4381.2016.001084
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
曼尼希碱/钨酸钠复配对N80钢缓蚀的协同作用
王赟1,2, 胡军1,3, 王甜甜1, 郑茂盛1
1. 西北大学 化工学院, 西安 710069;
2. 北京科技大学 新材料技术研究院, 北京 100083;
3. 陕北能源先进化工利用技术教育部工程研究中心, 西安 710069
Synergistic effect of Mannich base and sodium tungstate as corrosion inhibition for N80 steel
WANG Yun1,2, HU Jun1,3, WANG Tian-tian1, ZHENG Mao-sheng1
1. School of Chemical Engineering, Northwest University, Xi'an 710069, China;
2. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China;
3. Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy, Xi'an 710069, China
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摘要 采用电化学方法和扫描电镜研究曼尼希碱与钨酸钠在盐酸溶液中对N80钢的缓蚀作用,探讨其在N80钢表面的吸附行为,并且从腐蚀热力学和动力学角度分析复合缓蚀剂分子的缓蚀机理。结果表明:曼尼希碱加入盐酸溶液中后,增大了电荷转移电阻,降低了金属表面的腐蚀速率;它与钨酸钠复配后,金属表面的饱和吸附量增加,N80钢在盐酸溶液中的抗腐蚀性能显著增加,表现出了良好的协同效应。当曼尼希碱和钨酸钠摩尔比为1:1.5时,缓蚀效率可达99.65%。该缓蚀剂在N80钢表面的吸附服从Langmuir吸附模型,属于以化学吸附为主的吸附,且此过程为吸热反应。
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王赟
胡军
王甜甜
郑茂盛
关键词 电化学配合物腐蚀协同作用    
Abstract:The corrosion inhibition effect and adsorption behavior for N80 steel in HCl solution were investigated by using electrochemical method and scanning electron microscope, meanwhile, the corrosion inhibition mechanism of inhibitors was analysed from the point of view of the thermodynamic. The results indicate that when Mannich base is added into HCl solution, the charge transfer resistance increases, thereby the corrosion rate of metal surface is reduced. When Mannich base is compound with sodium tungstate, the saturated adsorption capacity of inhibitors on metal surface increases, and the corrosion resistance of N80 steel in HCl solution increases significantly, showing a good synergistic effect. When the molar ratio of Mannich base to sodium tungstate is 1:1.5, the highest inhibition efficiency can reach 99.65%. The adsorption of inhibitors on the surface of N80 is in accordance with the Langmuir adsorption model, and it mainly belongs to chemisorption. The process of adsorption on N80 surface is spontaneous and irreversible endothermic reaction.
Key wordselectrochemistry    complexe    enthalpy    corrosion    synergistic effect
收稿日期: 2016-09-11      出版日期: 2019-02-21
中图分类号:  TG174.3  
通讯作者: 胡军(1982-),男,博士,副教授,主要从事腐蚀与防护方面工作,联系地址:陕西省西安市碑林区太白北路229号西北大学化工学院(710069),E-mail:hujun32456@163.com     E-mail: hujun32456@163.com
引用本文:   
王赟, 胡军, 王甜甜, 郑茂盛. 曼尼希碱/钨酸钠复配对N80钢缓蚀的协同作用[J]. 材料工程, 2019, 47(2): 122-128.
WANG Yun, HU Jun, WANG Tian-tian, ZHENG Mao-sheng. Synergistic effect of Mannich base and sodium tungstate as corrosion inhibition for N80 steel. Journal of Materials Engineering, 2019, 47(2): 122-128.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001084      或      http://jme.biam.ac.cn/CN/Y2019/V47/I2/122
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