Berberine as a natural source inhibitor for mild steel in 1 M H2SO4

doi:10.1016/j.apsusc.2005.02.094

	Berberine as a natural source inhibitor for mild steel in 1 M H2SO4
	Li, Y; Zhao, P; Liang, Q ; Hou, BR
	2005-12-15
发表期刊	APPLIED SURFACE SCIENCE
ISSN	0169-4332
卷号	252 期号:5 页码:1245-1253
文章类型	Article
摘要	Berberine was abstracted from coptis chinensis and its inhibition efficiency on corrosion of mild steel in 1 M H2SO4 was investigated through weight loss experiment, electrochemical techniques and scanning electronic microscope (SEM) with energy disperse spectrometer (EDS). The weight loss results showed that berbefine is an excellent corrosion inhibitor for mild steel immersed in 1M H2SO4. Potentiodynamic curves suggested that berbefine suppressed both cathodic and anodic processes for its concentrations higher than 1.0 x 10(-4) M and mainly cathodic reaction was suppressed for lower concentrations. The Nyquist diagrams of impedance for mild steel in 1 M H2SO4 containing berbefine with different concentrations showed one capacitive loop, and the polarization resistance increased with the inhibitor concentration rising. A good fit to Flory-Huggins isotherm was obtained between surface coverage degree and inhibitor concentration. The surface morphology and EDS analysis for mild steel specimens in sulfuric acid in the absence and presence of the inhibitor also proved the results obtained by the weight loss and electrochemical experiments. The correlation of inhibition effect and molecular structure of berberine was then discussed by quantum chemistry study. (c) 2005 Elsevier B.V. All rights reserved.; Berberine was abstracted from coptis chinensis and its inhibition efficiency on corrosion of mild steel in 1 M H2SO4 was investigated through weight loss experiment, electrochemical techniques and scanning electronic microscope (SEM) with energy disperse spectrometer (EDS). The weight loss results showed that berbefine is an excellent corrosion inhibitor for mild steel immersed in 1M H2SO4. Potentiodynamic curves suggested that berbefine suppressed both cathodic and anodic processes for its concentrations higher than 1.0 x 10(-4) M and mainly cathodic reaction was suppressed for lower concentrations. The Nyquist diagrams of impedance for mild steel in 1 M H2SO4 containing berbefine with different concentrations showed one capacitive loop, and the polarization resistance increased with the inhibitor concentration rising. A good fit to Flory-Huggins isotherm was obtained between surface coverage degree and inhibitor concentration. The surface morphology and EDS analysis for mild steel specimens in sulfuric acid in the absence and presence of the inhibitor also proved the results obtained by the weight loss and electrochemical experiments. The correlation of inhibition effect and molecular structure of berberine was then discussed by quantum chemistry study. (c) 2005 Elsevier B.V. All rights reserved.
关键词	Berberine Mild Steel Electrochemical Measurement Sem/eds Acid Inhibitor
学科领域	Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
DOI	10.1016/j.apsusc.2005.02.094
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000233985900009
引用统计	被引频次：179[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/2292
专题	海洋环境腐蚀与生物污损重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Normal Coll, Dept Chem, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Li, Y,Zhao, P,Liang, Q,et al. Berberine as a natural source inhibitor for mild steel in 1 M H2SO4[J]. APPLIED SURFACE SCIENCE,2005,252(5):1245-1253.
APA	Li, Y,Zhao, P,Liang, Q,&Hou, BR.(2005).Berberine as a natural source inhibitor for mild steel in 1 M H2SO4.APPLIED SURFACE SCIENCE,252(5),1245-1253.
MLA	Li, Y,et al."Berberine as a natural source inhibitor for mild steel in 1 M H2SO4".APPLIED SURFACE SCIENCE 252.5(2005):1245-1253.

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