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Corrosion mitigation of mild steel by new rare earth cinnamate compounds

journal contribution
posted on 01.01.2004, 00:00 authored by F Blin, S Leary, K Wilson, G Deacon, P Junk, Maria ForsythMaria Forsyth
Corrosion rate measurements based on weight loss (i.e., mild steel immersed for seven days in 0.01 M NaCl) and linear polarization resistance (LPR) techniques have shown that even low concentrations (200 ppm) of cerium and lanthanum cinnamates are able to significantly inhibit corrosion. Of all the compounds investigated in this work Ce(4-methoxycinnamate)3· 2 H2O and La(4-methoxycinnamate)3· 2 H2O compounds exhibited the greatest inhibition and, in comparison with the component inhibitors, a synergy was clearly observed. The mechanism of corrosion inhibition was investigated using cyclic potentiodynamic polarization (CPP) measurements. The results suggest that La(4-nitrocinnamate)3· 2 H2O and Ce(4-methoxycinnamate)3· 2 H2O behave as mixed inhibitors and improve the resistance of steel against localized attack.

History

Journal

Journal of applied electrochemistry

Volume

34

Issue

6

Pagination

591 - 599

Publisher

Springer Netherlands

Location

Amsterdam, The Netherlands

ISSN

0021-891X

eISSN

1572-8838

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2004, Kluwer Academic Publishers