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The influence of organic structure and rare earth metal cation on the corrosion efficiency observed on AS1020 steel compared with La(4OHCin)3

1 ARC Centre of Excellence for Electromaterials Science, Institute for Frontier Materials, Deakin University, Burwood Campus, Australia;
2 Centre for Green Chemistry and School of Chemistry, Monash University, Clayton Campus, Australia;
3 College of Science, Technology, and Engineering, James Cook University, Townsville, Queensland, Australia

Special Issues: Rare-earth-based materials

Whilst the corrosion protection of steel in aqueous chloride environments by the rare earth inhibitor lanthanum 4-hydroxycinnamate is well known, the influence of the structural variation of the organic component as well as the nature of the metal centre has not previously been addressed. Herein we show that praseodymium 4-hydroxy cinnamate is comparable to its lanthanum counterpart in aqueous solution. On the other hand, cerium 4-hydroxycinnamate and lanthanum 2-hydroxycinnamate show poor corrosion protection performance while lanthanum 3-hydroxycinnamate provides a level of inhibition between these. These differences are shown to be related to the speciation in solution and are postulated to be linked to steric influences which are likely to affect the bonding environment within the rare earth compound itself, as well as its bonding with the steel substrate.
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References

1. McCafferty E (1979) Inhibition of the Crevice Corrosion of Iron in Chloride Solutions by Chromate. J Electrochem Soc 126: 385-390.    

2. Maji KD, Singh I (1982) Studies on the effect of sulphide ions on the inhibition efficiency of chromate on mild steel using radio—tracer technique. Anti-Corros Method M 29: 8-14.

3. McCafferty E (1989) Thermodynamic aspects of the crevice corrosion of iron in chromate/chloride solutions. Corros Sci 29: 391-401.    

6. Roberge PR (2000) Handbook of Corrosion Engineering. New Jersey: McGraw Hill.

7. Sinko J (2001) Challenges of chromate inhibitor pigments replacement in organic coatings. Prog Org Coat 42: 267-282.    

8. Monticelli C, Frignani A, Trabanelli G (2002) Corrosion inhibition of steel in chloride-containing alkaline solutions. J Appl Electrochem 32: 527-535.    

9. Grundmeier G, Schmidt W, Stratmann M (2000) Corrosion protection by organic coatings: electrochemical mechanism and novel methods of investigation. Electrochim Acta 45:2515-2533.    

10. Blin F, Koutsoukos P, Klepetsianis P, et al. (2007) The corrosion inhibition mechanism of new rare earth cinnamate compounds—Electrochemical studies. Electrochim Acta 52: 6212-6220.    

11. Blin F, Leary SG, Wilson K, et al. (2004) Corrosion Mitigation of Mild Steel by New Rare Earth Cinnamate Compounds. J Appl Electrochem 34: 591-599.    

12. Deacon GB, Forsyth M, Junk P, et al. (2008) From chromates to rare earth carboxylates: a greener take on corrosion inhibition. Chemistry Australia 75: 18-21.

13. Forsyth M, Seter M, Hinton B, et al. (2011) New ‘Green’ Corrosion Inhibitors Based on Rare Earth Compounds. Aust J Chem 64:812-819.

14. Catubig R, Seter M, Neil W, et al. (2011) Effects of Corrosion Inhibiting Pigment Lanthanum 4-Hydroxy Cinnamate on the Filiform Corrosion of Coated Steel. J Electrochem Soc 158: C353-C358.    

15. Seter M, Hinton B, Forsyth M (2012) Understanding Speciation of Lanthanum 4-Hydroxy Cinnamate and its Impact on the Corrosion Inhibition Mechanism for AS1020 Steel. J Electrochem Soc 159: C181-C189.    

16. Blin F, Leary SG, Deacon GB, et al. (2006) The nature of the surface film on steel treated with cerium and lanthanum cinnamate based corrosion inhibitors. Corros Sci 48: 404-419.    

17. Forsyth M, Forsyth CM, Wilson K, et al. (2002) ATR characterisation of synergistic corrosion inhibition of mild steel surfaces by cerium salicylate. Corros Sci 44: 2651-2656.    

18. Deacon GB, Forsyth M, Junk PC, et al. (2009) Synthesis and Characterisation of Rare Earth Complexes Supported by para-Substituted Cinnamate Ligands. Z Anorg Allg Chem 635:833-839.    

19. Reuben J, Fiat D (1969) Nuclear Magnetic Resonance Studies of Solutions of the Rare-Earth Ions and Their Complexes. IV. Concentration and Temperature Dependence of the Oxygen-17 Transverse Relaxation in Aqueous Solutions. J Chem Phys 51: 4918-4927.

20. Aime S, Fasano M, Terreno E (1998) Lanthanide(III) chelates for NMR biomedical applications. Chem Soc Rev 27: 19-29.    

21. Bryant RG (1983) The NMR time scale. J Chem Educ 60: 933-935.    

22. Pandey A, Murty NSS, Patel SM (2000) Application of infrared spectroscopy in the study of corrosion products. Process Contr Qual 11: 363-368.    

23. Deacon GB, Forsyth CM, Behrsing T, et al. (2002) Heterometallic CeIII-FeIII-salicylate networks: models for corrosion mitigation of steel surfaces by the Green inhibitor, Ce(salicylate)3. Chem Commun 23: 2820-2821.

Copyright Info: © 2015, Maria Forsyth, et al., licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

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