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Title: Local electrochemical impedance spectroscopy investigation of corrosion inhibitor films on copper
Authors: Souto, R. M.
Santana, J. J. 
Marques, A. G.
Simões, A. M.
UNESCO Clasification: 3303 ingeniería y tecnología químicas
Keywords: metal-corrosion inhibitor systems
Issue Date: 2012
Publisher: 1938-5862
Journal: ECS Transactions 
Conference: 7th Symposium on Critical Factors in Localized Corrosion held during the 220th Electrochemical-Society (ECS) Meeting 
7th Symposium on Critical Factors in Localized Corrosion - 220th ECS Meeting 
Abstract: In this work, the applicability of localized electrochemical impedance spectroscopy (LEIS) to characterize metal-corrosion inhibitor systems has been investigated. Copper corrosion inhibition by benzotriazole (BTA) and 2-mercaptobenzimidazole (MBI) has been studied, and compared to the electrochemical behaviour of the non inhibited metal. A rather wide frequency range of the AC potential signal was employed, namely 50 mHz ≤ f ≤ 65 kHz. The measurements were conducted for different probe-substrate distances in order to explore the effect of the different component of the localized impedance. Nyquist diagrams exhibit inductive loops in the high frequency range, and capacitive semicircles at intermediate and low frequencies for all the systems investigated, though they were affected in a different extent by the variation of the probe-substrate distance depending on the surface condition of the metal samples, this effect being more notorious for distances smaller than the dimensions of the bi-electrode probe.
ISBN: 978-1-60768-324-7
ISSN: 1938-5862
DOI: 10.1149/1.3697592
Source: Critical Factors In Localized Corrosion 7[ISSN 1938-5862],v. 41 (25), p. 227-235
Appears in Collections:Actas de congresos
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