Corrosion Inhibition by Prussian Blue

 

R. Kalaivani,¹ B. Narayanaswamy,² J. A. Selvi,³ A. J. Amalraj,⁴ J. Jeyasundari,³ S. Rajendran^3,*

 

¹ Department of Chemistry, Kalasalingam University, Anandnagar, Krishnankoil 626 190. Srivilliputhur, India

² Department of Chemistry, Thiagarajar College of Engineering, Madurai-625006. India

^3*Corrosion Research Centre, Post Graduate and Research Department of Chemistry, GTN Arts College, Dindigul-624005, India

⁴Department of Chemistry, Loyola College, Chennai, India

 

Received 25 October 2008; accepted 17 February 2009

 

Abstract

The inhibition efficiency (IE) of K₃[Fe(CN)₆] in controlling corrosion of carbon steel in aqueous solution containing 60 ppm of Cl^- in the presence and absence of Zn²⁺ has been evaluated by weight loss method. The formulation consisting of 100 ppm K₃[Fe(CN)₆] and 50 ppm Zn²⁺ offers 98% inhibition efficiency to carbon steel immersed in aqueous solution containing 60 ppm Cl^-. A synergistic effect exists between K₃[Fe(CN)₆] and Zn²⁺. As immersion period increases, the inhibition efficiency of K₃[Fe(CN)₆]─ Zn²⁺ system decreases. Polarization study reveals that this formulation controls the cathodic reaction predominantly. AC impedance spectra reveal that a protective film is formed on the metal surface. FTIR spectra reveal that the protective film consists of Prussian blue and Zn(OH)₂. The film is found to be UV fluorescent.

Keywords: corrosion inhibition, carbon steel, Prussian blue, synergistic effect.

 

 

Full text only in PDF format

Texto disponível em PDF

 

 

References

1. G.B. Hatch, Corrosion Inhibitors, Ed. C.C. Nathan, NACE, Houston, Texas, U.S.A (1973) 126.

2. J. Golden, J.E.O. Mayne, Br.Corrosion J. 13 (1978) 45.

3. J.P.G. Farr, M. Saremi, Surface Technology 19 (1983)137.        [ Links ]

4. W.D. Robertson, J. Electrochem. Soc. 98 (1951) 94.

5. C.B. Wooten , Japan kokai 75, 68, 645 (Appl 30.11.76 )

6. M. Cohen, Corrosion 32 (1976) 461.        [ Links ]

7. S. Sanyal, Bull. Electrochem. 6 (1990) 392        [ Links ]

8. G.B. Hatch, Ind. Eng. Chem. 44 (1952) 1775.

9. J.L. Mansa, Szybalski, Corrosion 8 (1952) 381.

10. K.S. Rajagopalan, K. Venu, Indian J. Techn. 6 (1968) 239.

11. J.W. Wood, J.S. Beecher, P.S. Laurence, Corrosion 13 (1957) 41.        [ Links ]

12. M. Iovchev, 8^th International Congress on Metallic Corrosion, Publ. Dechema Frankfurt 2 (1981 ) 1488.

13. E.D. Mor, C. Wrubl, Br. Corrosion J. 11 (1976) 199.

14. D. Vanloyen, G. Zucher, Werkst. Korros. 11 (1990) 613.

15. E.V. Bogatyreva, S.A. Balezin, Zh. Priklad. Khim. 35 (1962) 550.

16. E.V. Bogatyreva, V.V. Nagaev, Zh. Priklad. Khim. 35 (1962) 550.

17. Yu.I. Kuzentsov, S.V. Oleynik, N.N. Andreev, S.S. Vesely, 6^th Europ.Symp. Corrosion Inhibitors, Ferrara, Italy, 1 (1985) 567.

18. P.J. Deslauriers, Mater. Perform. NACE 11 (1985) 35.

19. G. Wranglen, Introduction to Corrosion and Protection of Metals, Chapman & Hall, London, (1985) 236.

20. S.K. Selvaraj, A. John Kennedy, A.J. Amalraj, S. Rajendran, N. Palaniswamy, Corrosion Rev. 22 (2004) 219.

21. Richard A. Nyquist, Ronald O. Kagel, Infra Red Spectra of Inorganic Compounds, Academic Press, New York and London - 1971 (971) 64,65 & 68.

 

* Corresponding author. E-mail address: srmjoany@sify.com