A study of rare-earth 3-(4-methylbenzoyl)-propanoate compounds as corrosion inhibitors for AS1020 mild steel in NaCl solutions

Journal Publication ResearchOnline@JCU
Peng, Yu;Hughes, Anthony E.;Deacon, Glen B.;Junk, Peter C.;Hinton, Bruce R.W.;Forsyth, Maria;Mardel, James I.;Somers, Anthony E.
Peter Junk
Abstract

In this work two novel rare-earth (RE) 3-(4-methylbenzoyl)-propanoate (mbp) complexes (RE(mbp)₃; RE = La, Y) have been investigated and compared with the well-researched inhibitor, lanthanum 4-hydroxycinnamate (La (4-OHcin)₃), for AS1020 mild steel in 0.01 M NaCl solutions. The electrochemical results reveal a high corrosion inhibition performance of Y(mbp)₃ which is attributed to the build-up of a protective surface film with a high level of corrosion resistance particularly after 24 h. Surface analyses indicate that the metal surface is protected during the immersion in Y(mbp)₃-inhibited solutions and the presence of Y is confirmed on the substrate surface.

Journal

Corrosion Science

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Volume

145

ISBN/ISSN

1879-0496

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Pages Count

13

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Publisher

Pergamon-Elsevier Science

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DOI

10.1016/j.corsci.2018.09.022