Corrosion Inhibition Propargyl Alcohol on Low Alloy Cr Steel in 0.5 M H2SO4 in the Absence and Presence of Potassium Iodide

Abstract

The corrosion and inhibition behaviors of low alloy Cr steel in sulfuric acid in the presence of propargyl alcohol (PA) and potassium iodide (KI) have been studied using Electrochemical Impedance Spectroscopy (EIS) and Tafel polarization method. It was found that the inhibition efficiency increased with PA concentration. The addition of potassium iodide to propargyl alcohol in solution increased the inhibition efficiency of propargyl alcohol. A synergistic effect was observed between KI and PA with optimum of concentration of 10 mMol propargyl alcohol + 0.01% potassium iodide. Adsorption of propargyl alcohol alone or in combination with potassium iodide on the metal surface obeyed the Langmuir adsorption isotherm and thermodynamic calculations revealed that that the adsorption of inhibitors were of physical nature. That suggest the presence of iodide ions in solution increases the surface coverage.

  

Key Words: Inhibitor, Propargyl alcohol, Potassium iodide,

 Synergistic.

 

Keywords

• Inhibitor, Propargyl alcohol, Potassium iodide, Synergistic.

Potassium Iodide

Abstract

References

1. Rozenfeld, I.L., “Corrosion Inhibitors”, McGraw– Hill, New York, (1981).
2. Gonacalves, R.S, Azambuja, D.S., Serpa Lucho, A.M.,“Electrochemical studies of propargyl alcohol as corrosion inhibitor for nickel, copper, and copper/nickel (55/45) alloy”, Corros Sci., 44:467- 479(2002).
3. Duwell, E.J., ”The Effect of Acetylenic Molecules on Cathodic Overvoltage on Steel in Acid Solutions”, J. Electrochem. Soc., 109:1013-1017 (1962).
4. Poling, G.W.,” Infrared studies of protective film formed by acetylenic corrosion inhibitors”, J. Electrochem.Soc., 114:1209-1214(1967).
5. Tedeschi, R.J., “Acetylenic corrosion inhibitor”, Corrosion., 31:130-134 (1975).
6. Jayaperumal, D. Muralidharan, S., Subramanian, P, Venkatachari, G., Senthilvel, S., “Propargyl alcohol as hydrochloric acid inhibitor for mild steel - temperature dependence of critical concentration” Anti Corrosion Methods & Materials, 44(4): 265- 268(1997).
7. Spineelli, A., Goncalves. R.S., “Electrochemical studies of the adsorption of propargyl alcohol on low carbon steel electrodes in H2SO4 solutions”, Corros Sci., 30:1235-1246(1990).
8. Gonacalves, R.S., Azambuja, D.S., Serpa Lucho , A.M.,“Electrochemical studies of propargyl alcohol as corrosion inhibitor for nickel, copper, and copper/nickel (55/45) alloy”, Corros Sci., 44:467- 479(2002).

9. Feng, Y., Siow, K.S., Teo,W.K., Hsieh, A.K.,“The synergistic effects of propargyl alcohol and potassium iodide on the inhibition of mild steel in 0.5 M sulfuric acid solution”, Corros Sci., 41: 829- 859 (1999).
10. Epelboin, K., Kedam, K., Takenouti, H., “Use of impedance measurements for the determination of the instant rate of metal corrosion”, J. Appl. Electrochem., 2:71-79 (1972).
11. Aramaki, K., Fujioka, E., “Spectroscopic Investigations on the Inhibition Mechanism of Propargyl Alcohol for Iron Corrosion in Hydrochloric Acid at Elevated Temperatures” Corrosion, 53:14-22().
12. Bartos, M., Kapusta, S., Hackerman, N., “Study of polymerization of propargyl alcohol on steel”, J. Electrochem. Soc., 140: 2604 -2605 (1993).
13. Padobave, N.I., Avdeev,Ya, G., “The effect anions and inhibition mixed with propargyl alcohol on electrode reaction and corrosion steel in sulfuric acid”, Protection Metals, 37:13-17(2001).
14. Ma, H., Cheng, X., Li, G., Chen, S., Quan,Z., Zhao,S., Niu, L., “The influence of hydrogen sulfide on corrosion of iron under different condition”, Corros .Sci.,42:1669-1683 (2000).
15. Gojic, M., “The effect of propargylic alcohol on the corrosion inhibition of low alloy Cr Mo steel in sulphuric acid”, Corros Sci, 43:919-929 (2001).
16. Jeyaprabha, C., Sathiyanarayana, S., Venkatachari, G., “Effect of cerium ions on corrosion inhibition of PANI for iron in 0.5 M H2SO4”, Appl. Surf. Sci., 253: 432-438 (2006).
17. Bentiss, F., Traisenl, M., Lagrenee, M., “The substituted 1,3,4-oxadiazoles: a new class of corrosion inhibitors of mild steel in acidic media”, Corros Sci., 42:124-127 (2000).
18. Larabi, L., Harek, Y., TraisneiL, M., Mansri, A., “Synergistic influence of poly(4-vinylpyridine) and potassium iodide on inhibition of corrosion of mild steel in 1M HCl”, Electrochemistry, 34: 833-839 (2004).
19. Shen, C.B., Han, D.Y., Ding, Z.M., “The inhibition effect of thiourea on bulk nanocrystallized ingot iron in acidic sulfate solution”, Maters. Chem. Phys., 109:417-421(2008).
20. Sastri, I.V.S., "Corrosion Inhibitors", John Wiley & Sons, New York, (1998).
21. Amin, M.A., “Weight loss polarization electrochemical impedance spectroscopy SEM and EDX studied of the corrosion inhibition of copper in aerated NaCl solution”, J. Appl. Electrochem ., 36: 215-226 (2005).
22. Abdullah, M., “Rhoadmine azosupha as corrosion inhibitors for corrosion of 304 stainless Steel in hydrocholoric acid solution”, Corros Sci., 44: 717- 728 (2002).