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中国腐蚀与防护学报  2009, Vol. 29 Issue (6): 447-452    
  研究报告 本期目录 | 过刊浏览 |
红四氮唑对冷轧钢在磷酸溶液中的缓蚀性能
李向红1;邓书端2;付惠1;白玮3
1. 西南林学院基础部 昆明 650224
2. 西南林学院木质科学与装饰工程学院 昆明 650224
3. 云南民族大学化学与生物技术学院 昆明 650031
INHIBITION EFFECT OF RED TETRAZOLIUM ON COLD ROLLED STEEL IN H3PO4 SOLUTION
LI Xianghong1; DENG Shuduan2; FU Hui1; BAI Wei3
1. Department of Fundamental Courses; Southwest Forestry University; Kunming 650224
2. Department of Wood Science and Technology; Southwest Forestry University; Kunming 650224
3. School of Chemistry and Bio-Science; Yunnan Nationalities University; Kunming 650031
全文: PDF(978 KB)  
摘要: 

用失重法、动电位极化曲线和原子力显微镜(AFM)研究了红四氮唑对冷轧钢在1.0 mol/L~10.0 mol/L H3PO4溶液中的缓蚀作用。结果表明:红四氮唑对冷轧钢具有中等程度的缓蚀作用,为混合抑制型缓蚀剂,且在钢表面的吸附符合Freundlich吸附模型;通过吸附热力学和腐蚀动力学公式分别求出了相应的吸附热力学参数和动力学参数,并根据这些参数详细讨论了缓蚀作用机理;AFM测试结果表明添加红四氮唑后钢表面较为平整,粗糙度降低。

关键词 磷酸冷轧钢红四氮唑缓蚀吸附原子力显微镜    
Abstract

The inhibition effect of red tetrazolium on the corrosion of cold rolled steel (CRS) in 1.0 mol/L~10.0 mol/L  H3PO4 solution has been studied by mass loss and potentiodynamic polarization methods. Atomic force microscope (AFM) provided the CRS surface conditions. The results show that neutral red tetrazolium is a moderate inhibitor for CRS. Inhibition efficiency increases with the inhibitor concentration, while decreases with increasing the temperature. The adsorption of red tetrazolium on the CRS surface follows the Freundlich adsorption isotherm equation. The experimental data have been treated with adsorption thermodynamic and corrosion kinetic equations. Three adsorption thermodynamic parameters (adsorption free energy ΔG0, adsorption heat Δ H0, adsorption entropy Δ S0) and two kinetic parameters (corrosion ratek, kinetic reaction constant B) are also calculated. The inhibitive mechanism is discussed in detail according to the parameters. The results show that the adsorption process is a spontaneous and exothermic process accompanied by a decrease in entropy. The corrosion of cold rolled steel in  H3PO4 support the kinetic equation proposed by Mathur and Vasudevan. The rate constant k and kinetic reaction constant B decreased after adding red tetrazolium. Polarization curves show that red tetrazolium is a mixed-type inhibitor, and its inhibition on CRS is caused by geometric blocking effect. AFM results show that the introduction of red tetrazolium into  H3PO4 solution results in decreasing the surface roughness.

Key wordsphosphoric acid    cold rolled steel    red tetrazolium    inhibition    adsorption    atomic force microscope
收稿日期: 2008-10-06     
ZTFLH: 

TG 142

 
基金资助:

云南省教育厅基金项目(06Y073A)和西南林学院重点科研基金项目(110605)资助

通讯作者: 李向红     E-mail: xianghong-li@163.com
Corresponding author: LI Xianghong     E-mail: xianghong-li@163.com
作者简介: 李向红,男,1981年生,硕士,副教授,研究方向为缓蚀剂

引用本文:

李向红 邓书端 付惠 白玮. 红四氮唑对冷轧钢在磷酸溶液中的缓蚀性能[J]. 中国腐蚀与防护学报, 2009, 29(6): 447-452.
LI Xiang-Hong, DENG Shu-Duan, FU Hui, BO Wei. INHIBITION EFFECT OF RED TETRAZOLIUM ON COLD ROLLED STEEL IN H3PO4 SOLUTION. J Chin Soc Corr Pro, 2009, 29(6): 447-452.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2009/V29/I6/447

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