DIFFERENCES BETWEEN APPARENT POLARIZATION RESISTANCE VALUES OBTAINED IN THE TIME AND FREQUENCY DOMAINS

被引：9

作者：

FELIU, S ^{[1
]}

GALVAN, JC ^{[1
]}

FELIU, S ^{[1
]}

SIMANCAS, J ^{[1
]}

BASTIDAS, JM ^{[1
]}

MORCILLO, M ^{[1
]}

ALMEIDA, E ^{[1
]}

机构：

[1] LAB NACL ENGN & TECHNOL IND,SCPM,P-1699 LISBON,PORTUGAL

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1995年 / 381卷 / 1-2期

关键词：

CORROSION RATE; TIME DOMAIN MEASUREMENT; FREQUENCY DOMAIN MEASUREMENT; POLARIZATION RESISTANCE;

D O I：

10.1016/0022-0728(94)03676-T

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Anomalously large differences between values of the polarization resistance R(p) measured in the time and frequency domains pose a serious problem in determination of the corrosion rate from the Stern-Geary equation. A theoretical model is used to derive expressions for a quantitative interpretation of the effect of a number of parameters on the apparent R(p) values obtained by de and ac measurements. Problems associated with the determination of the true R(p) value are discussed, and some relevant questions concerning the minimum frequency needed for impedance measurements are identified.

引用

页码：1 / 4

页数：4

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