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2-氨基嘧啶在盐酸介质中对钢的缓蚀性能

李向红1*,邓书端2,付惠1   

  1. (1.西南林业大学理学院 昆明 650224；2.西南林业大学材料工程学院 昆明)
  • 收稿日期:2011-03-01 修回日期:2011-05-08 出版日期:2012-02-10 发布日期:2012-02-10
  • 通讯作者: 李向红，副教授; Tel/Fax:0871-3863377; E-mail:xianghong-li@163.com; 研究方向：金属材料的腐蚀与防护
  • 基金资助:
    云南省教育厅自然科学研究基金项目（09C0181）

Corrosion Inhibition of 2-Aminopyrimidine for Steel in Hydrochloric Acid Media

LI Xianghong1*, DENG Shuduan2, FU Hui1   

  1. (1.Faculty of Science,Southwest Forestry University,Kunming 650224;
    2.Faculty of Materials Engineering,Southwest Forestry University,Kunming)
  • Received:2011-03-01 Revised:2011-05-08 Published:2012-02-10 Online:2012-02-10

PDF

993

被引次数

5

摘要： 用失重法、动电位极化曲线和电化学阻抗谱（EIS）研究了2-氨基嘧啶(2-AP)在1.0~5.0 mol/L HCl溶液中（20~50 ℃）对冷轧钢的缓蚀作用。 结果表明,2-AP对冷轧钢在1.0 mol/L HCl中具有良好的缓蚀作用，且在钢表面的吸附符合校正的Langmuir吸附模型；缓蚀率随缓蚀剂浓度的增加而增大，但随温度的升高和HCl浓度的增加而降低。 2-AP为混合抑制型缓蚀剂；EIS谱呈半圆容抗弧，电荷转移电阻随缓蚀剂浓度的增加而增大。

关键词: 氨基嘧啶, 盐酸, 冷轧钢, 缓蚀, 吸附

Abstract: The inhibition effect of 2-aminopyrimidine(2-AP) on the corrosion of cold rolled steel(CRS) in 1.0~5.0 mol/L HCl media at 20~50 ℃ has been studied by mass loss, potentiodynamic polarization curves and electrochemical impedance spectroscopy(EIS) methods. The results showed that the neutral 2-AP is a good inhibitor for CRS, and the adsorption of 2-AP on the CRS surface follows the amended Langmuir adsorption isotherm equation. Inhibition efficiency increases with the inhibitor concentration, while decreases with temperature and the concentration of HCl. Polarization curves showed that 2-AP is a mixed-type inhibitor. EIS spectra exhibited one capacitive loop, and the charge transfer resistance increased with the inhibitor 2-AP concentration.

Key words: aminopyrimidne, hydrochloric acid, cold rolled steel, corrosion inhibition, adsorption

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