File(s) under permanent embargo

An interaction between praseodymium 4-Hydroxycinnamate with AS1020 and X65 steel microstructures in carbon dioxide environment

journal contribution
posted on 01.01.2018, 00:00 authored by N D Nam, C Panaitescu, Mike Yongjun TanMike Yongjun Tan, Maria ForsythMaria Forsyth, Bruce HintonBruce Hinton
This work reports on the application of a rare earth organic compound, praseodymium 4-hydroxycinnamate - Pr(4OHCin)3, as an effective inhibitor suitable for preventing carbon dioxide corrosion of steels in an aggressive environment. Two steels, namely an AS1020 and a X65 steel, have been tested in 0.01 M NaCl solution saturated with carbon dioxide gas using electrochemical and surface analysis techniques. The results show that X65 steel is less susceptible to corrosion than AS1020 steel in CO2-saturated 0.01 M NaCl solution as indicated by a lower corrosion current density and a higher polarization resistance. On the other hand, the AS1020 was inhibited much more effectively by praseodymium 4-hydroxycinnamate compound in comparison with X65 steel, as the corrosion behavior of AS1020 and X65 steels was similar in the presence of the inhibitor. However, the inhibiting effects on the anodic reaction was greater for AS1020 due to a reduction in the anodic current density in comparison with X65 steel. The dramatic effect of praseodymium 4-hydroxycinnamate compound could be attributed to the protective inhibiting deposits and enhanced film formation on the more active steel surface.

History

Journal

Journal of The Electrochemical Society

Volume

165

Issue

2

Pagination

C50 - C59

Publisher

Electrochemical Society

Location

Pennington, N.J.

ISSN

0013-4651

eISSN

1945-7111

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2018, The Electrochemical Society