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Vol. 29 No. 8 (2017): Vol 29 Issue 8

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Effect of Organo-Nitrogen Compounds on Inhibition Efficiency of Mild Steel Corrosion in Acidic Media

https://doi.org/10.14233/ajchem.2017.20631
Asma Mohammed Z. El-Sharif
Chemistry Department, University of Dammam, Dammam 31113, Saudi Arabia

Corresponding Author(s) : Asma Mohammed Z. El-Sharif

aelsharif@uod.edu.sa

Asian Journal of Chemistry, Vol. 29 No. 8 (2017): Vol 29 Issue 8

Abstract

Some dodecylamine derivatives have been synthesized and were further elaborated by quaternization with an allyl group. The presence of diallyl moiety made some of these derivatives effective in inhibiting mild steel corrosion in acidic media. The study of mild steel corrosion was carried out using gravimetric and potentiodynamic polarization methods. At 60 °C, the inhibitors exhibited excellent inhibition efficiencies (% IE) of about 99 % (at 200 ppm) in 1 M HCl and about 11-97 % (at 400 ppm) in 0.5 M H2SO4. The inhibitors containing the diallyl moiety demonstrated the higher inhibition efficiencies in H2SO4. Some of the quaternary salts were effective in preventing corrosion in 3.5 % NaCl (% IE about 63-85 % at 200 ppm). The coordinate type of bond involving interactions of p-electrons with the iron d-orbitals allows the inhibitors to impede anodic oxidation of iron. The mechanisms emphasizing the role of the synthesized organo-nitrogen moieties in corrosion suppression process.

Keywords

Corrosion inhibition Mild steel Acidic media Saline media Polarization curves Dodecyl amines
El-Sharif, A. M. Z. (2017). Effect of Organo-Nitrogen Compounds on Inhibition Efficiency of Mild Steel Corrosion in Acidic Media. Asian Journal of Chemistry, 29(8), 1779–1784. https://doi.org/10.14233/ajchem.2017.20631
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