METHOD FOR DETERMINING THE FARADAIC IMPEDANCE OF AN ELECTRODE-REACTION - APPLICATION TO METAL CORROSION RATE MEASUREMENTS

被引：17

作者：

BERTHIER, F ^{[1
]}

DIARD, JP ^{[1
]}

LEGORREC, B ^{[1
]}

MONTELLA, C ^{[1
]}

机构：

[1] ECOLE NATL SUPER ELECTROCHIM & ELECTROME GRENOBLE,CTR RECH ELECTROCHIM MINERALE & GENIE PROC,F-38402 ST MARTIN DHERES,FRANCE

来源：

CORROSION | 1995年 / 51卷 / 02期

关键词：

ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; FARADAIC IMPEDANCE; POLARIZATION RESISTANCE; TRANSFER RESISTANCE;

D O I：

10.5006/1.3293582

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A method was developed to determine the faradaic impedance (Z(f)) of an electrode reaction on the basis of a measurement of the electrode impedance (Z). Neither the reaction mechanism nor the equivalent electric circuit needed to be known. Z(f) was determined by a method based on determination of the minimum of the length of the electrode admittance diagram minus the capacitive term. A similar method applied to Z(f) could be used to obtain the electronic transfer and electrode polarization resistances (R(t) and R(p), respectively) automatically and thus the corrosion rate for measurements carried out al the corrosion potential (E(corr)). The proposed method was applied to zinc (Zn) corroding in a 3% sodium chloride (NaCl) solution.

引用

页码：105 / 115

页数：11

共 17 条

[1] THE INSTANTANEOUS IMPEDANCE OF NONSTATIONARY ELECTROCHEMICAL SYSTEMS - APPLICATION TO A CORRODING ZINC ELECTRODE [J].