authors |
Yasakau, KA; Zheludkevich, ML; Ferreira, MGS |
nationality |
International |
journal |
JOURNAL OF THE ELECTROCHEMICAL SOCIETY |
keywords |
PROBE FORCE MICROSCOPY; ALUMINUM-ALLOY; ATOMIC-FORCE; CERIUM; AA2024-T3; AL-5083; ADDITIONS; NACL |
abstract |
The inhibition effect of trivalent lanthanide (Ce3+, La3+) cations toward the localized corrosion of 5083 aluminum alloy in chloride-containing solutions was investigated in the present work. Electrochemical impedance spectroscopy was employed to estimate the inhibition efficiency of the lanthanide species under study. Scanning Kelvin probe force microscopy was used to provide deeper understanding of the corrosion and inhibition mechanisms at the micro level. The results of electrochemical tests demonstrate effective hindering of the localized corrosion attack due to precipitation of highly insoluble deposits on cathodic intermetallics. Trivalent lanthanum cations confer a more effective corrosion inhibition in comparison to that of Ce3+. Superior inhibition of La3+ resulted from the formation of very dense hydroxide domes while cerium-based precipitates have a porous granulated structure. (c) 2008 The Electrochemical Society. |
publisher |
ELECTROCHEMICAL SOC INC |
issn |
0013-4651 |
year published |
2008 |
volume |
155 |
issue |
5 |
beginning page |
C169 |
ending page |
C177 |
digital object identifier (doi) |
10.1149/1.2844341 |
web of science category |
Electrochemistry; Materials Science, Coatings & Films |
subject category |
Electrochemistry; Materials Science |
unique article identifier |
WOS:000254779700019
|