应用动电位极化法和电化学阻抗(EIS)研究了樟树叶提取液(CCLE)在硫酸介质中对碳钢的缓蚀性能和缓蚀机理. 结果表明, 采用酸浸泡法从樟树叶中提取的缓蚀剂, 对碳钢在10% H2SO4溶液中具有良好的缓蚀作用, 随着提取液浓度的增加, 缓蚀效率增大; 随着实验温度升高, 缓蚀效率减小. 樟树叶提取液为混合抑制型缓蚀剂, 提取液中的有效缓蚀成分在碳钢表面的吸附满足Langmuir等温吸附方程; 樟树叶提取液的加入使碳钢在硫酸中反应的表观活化能增加, 起到缓蚀作用.
The corrosion inhibition effect of the Cinnamomum camphor leaves extractive for carbon steel in 10% H2SO4 solution was investigated by using potentiodynamic polarization and electrochemical impedance spectroscopy. The results showed that the Cinnamomum camphor leaves extractive had good corrosion inhibition effect for carbon steel in 10\% H2SO4 solution. The inhibition efficiency increased with increasing concentration of Cinnamomum camphor leaves extractive, and decreased with increasing temperature. The Cinnamomum camphor leaves extractive was a mixed-type inhibitor, and the adsorption of the effective corrosion inhibition component of Cinnamomum camphor leaves extractive on the carbon steel surface conformed with Langmuir adsorption isotherm equation. The addition of Cinnamomum camphor leaves extractive in sulfuric acid solution enhanced the apparent activation energy of the reaction on carbon steel, which made the corrosion inhibition effective.
参考文献
| [1] | 杨文治, 黄魁元, 王清等. 缓蚀剂[M]. 北京: 化学工业出版社,1989.[2] 王慧龙,郑家燊. 环境友好缓蚀剂的研究进展 [J].腐蚀科学与防护技术, 2002, 14(5): 275.[3] 汤兵, 陈欣义. 酸洗过程中的缓蚀剂 [J]. 清洗世界, 2006,22(2): 22.[4] 王先. 芳樟叶黄酮和多糖的提取分离、结构鉴定及抗氧化活性研究[D]. 厦门：厦门大学硕士论文, 2008.[5] 曹楚南. 腐蚀电化学原理[M]. 北京: 化学工业出版社, 2008.[6] 郑兴文, 龚敏, 邹振等.竹叶提取液在硫酸介质中的缓蚀性能及复配研究 [J]. 腐蚀科学与防护技术,2009, 21(5): 443.[7] 李伟华, 陶志华, 张胜涛等.酸性介质中氮杂环类缓蚀剂在碳钢上的吸附行为 [J]. 腐蚀科学与防护技术,2010, 22(1): 39.[8] 刘晓轩, 袁朗白, 李向红等.氨基酸类有机物在硫酸介质中对钢的缓蚀作用 [J].云南大学学报(自然科学版), 2003, 25(4): 355.[9] Mohammed A Amin, Khaled K F, Sahar A Fadl-Allah. Testing validity of the Tafel extrapolation method for monitoring corrosion of cold rolled steel in HCl solutions-Experimental and theoreticalstudies [J]. Corros. Sci., 2010, 52: 140.[10] Sathiyanarayanan S, Jeyaprabha C, Venkatachari G. Influence of metal cations on the inhibitive effect of polyaniline for iron in 0.5 M H2SO4 [J]. Mater. Chem. Phys., 2008,107: 350. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%