Theoretical interpretation on impedance spectra for anodic iron   dissolution in acidic solutions containing hydrogen sulfide

CORC > 北京大学 > 化学与分子工程学院

	Theoretical interpretation on impedance spectra for anodic iron dissolution in acidic solutions containing hydrogen sulfide
	Ma, HY ; Cheng, XL ; Chen, SH ; Li, GQ ; Chen, X ; Lei, SB ; Yang, HQ
刊名	corrosion
	1998
关键词	charge transfer electrochemical impedance spectroscopy equivalent circuit hydrogen sulfide polarization resistance resistance ADSORBED INTERMEDIATE STABILITY CONDITIONS PLANE DISPLAYS STEADY-STATE ELECTRODE
英文摘要	Nyquist impedance diagrams for dissolution of iron in acidic solutions with hydrogen sulfide (H2S) display an inductive loop in the fourth quadrant and two capacitive loops in the first quadrant at lower anodic potentials, The charge-transfer resistance (R-t) was larger than polarization resistance (R-p). A general reaction model originating from chemisorption followed by two successive charge-transfer steps was established to examine the proposed mechanism. Theoretical derivation showed the model could be used to Interpret impedance results very well when charge-transfer coefficients of the two charge-transfer steps were approximately the same and when the Faradaic desorption step was the rate-determining step. At higher anodic potentials, the Nyquist diagrams comprised an inductive and a capacitive loop, indicating a change In the reaction mechanism. This type of impedance plot could be Interpreted by a model similar to the Bockris mechanism.; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; SCI(E); 0; ARTICLE; 8; 634-640; 54
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/401618]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Ma, HY,Cheng, XL,Chen, SH,et al. Theoretical interpretation on impedance spectra for anodic iron dissolution in acidic solutions containing hydrogen sulfide[J]. corrosion,1998.
APA	Ma, HY.,Cheng, XL.,Chen, SH.,Li, GQ.,Chen, X.,...&Yang, HQ.(1998).Theoretical interpretation on impedance spectra for anodic iron dissolution in acidic solutions containing hydrogen sulfide.corrosion.
MLA	Ma, HY,et al."Theoretical interpretation on impedance spectra for anodic iron dissolution in acidic solutions containing hydrogen sulfide".corrosion (1998).