EIS and ENM measurements for three different organic coatings on aluminum

Authors
Le Thu, Q Bierwagen, GP Touzain, S
Citation
Q. Le Thu et al., EIS and ENM measurements for three different organic coatings on aluminum, PROG ORG C, 42(3-4), 2001, pp. 179-187
Citations number
24
Categorie Soggetti
Material Science & Engineering
Journal title
PROGRESS IN ORGANIC COATINGS
ISSN journal
03009440 → ACNP
Volume
42
Issue
3-4
Year of publication
2001
Pages
179 - 187
Database
ISI
SICI code
0300-9440(200109)42:3-4<179:EAEMFT>2.0.ZU;2-2
Abstract
Electrochemical impedance spectroscopy (EIS) and Electrochemical noise meas urements (ENM) were used to evaluate protective properties of three differe nt organic coating systems. The coatings under investigation were two-compo nent aerospace coatings, applied on aluminum substrate. They were immersed in a 0.5 mol l(-1) sodium chloride (NaCl) solution, within a controlled flo w cell and were tested for 1 year. The impedance modulus in the low frequency domain and the noise resistance were calculated and compared. From EIS data, coating capacitances and coati ng resistances of coating performance were estimated. The electrochemical r esults are in good agreement with final visual observations. The results of this study yield a performance ranking of the three different coatings. (C ) 2001 Elsevier Science B.V. Ail rights reserved.