Premium
Electrochemical techniques correlation study of on‐line corrosion monitoring probes
Author(s) -
Wu J.W.,
Bai D.,
Baker A. P.,
Li Z.H.,
Liu X.B.
Publication year - 2015
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201307175
Subject(s) - corrosion , electrode , dielectric spectroscopy , polarization (electrochemistry) , materials science , electrochemistry , reference electrode , analytical chemistry (journal) , electrical impedance , metallurgy , chemistry , electrical engineering , chromatography , engineering
Electrochemical techniques, such as linear polarization resistance (LPR), weak polarization (WP), electrochemical impedance spectroscopy (EIS), are effective tools to characterize instantaneous corrosion rates. In this work, LPR, WP, EIS techniques have been applied to calculate corrosion rates based on various electrode probe systems. These include classical three electrode systems (CTES), three identical electrode systems (Three‐IES), three electrode systems of stainless steel as reference Three‐ES (SS‐RE), two identical electrode systems (Two‐IES). Weight loss coupons were used to set a baseline for comparison between the different electrode probe systems. Polarization resistances calculated by EIS and LPR follows the order: CTES/Two‐IES/Three‐ES (SS‐RE) > Three‐IES. Corrosion rates measured by various techniques follow the order: LPR > WP > EIS >> coupon. Then effects of electrode systems and the electrochemical techniques are discussed, and combinations of electrode probe systems and electrochemical techniques are suggested for industrial applications.