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International Journal of Latest Research in Science and Technology

DOI:10.29111/ijlrst   ISRA Impact Factor:3.35

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INHIBITION OF CORROSION OF MILD STEEL IN H2SO4 SOLUTION BY SULFACHLOROPYRIDAZINE: SYNERGISM BY CATIONS AND HALIDES.

Research Paper Open Access

International Journal of Latest Research in Science and Technology Vol.4 Issue 2, pp 138-143,Year 2015

INHIBITION OF CORROSION OF MILD STEEL IN H2SO4 SOLUTION BY SULFACHLOROPYRIDAZINE: SYNERGISM BY CATIONS AND HALIDES.

O. A. Hazazi

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Received : 17 April 2015; Accepted : 22 April 2015 ; Published : 30 April 2015

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Abstract

The synergism between sulfachloropyridazine (SCP), halides and/or copper ions on the inhibition of the corrosion of mild steel in 0.5 M H2SO4 solution has been studied using potentiodynamic measurements and electrochemical impedance spectroscopy (EIS). It has been found that the corrosion inhibition of mild steel by SCP is enhanced in the presence of halides and/or copper ions. SCP alone preferentially inhibits the anodic branch while Cu2+ + SCP inhibits the anodic branch and promote the cathodic one. However, the overall effect is that the inhibition efficiency in the latter case is larger than the former. In the presence of SCP + Cu2+ + halides, the inhibition efficiency is the largest and the promotion of the cathodic current by Cu2+ is overweighed by adding halides. Thus adding both Cu2+ and halides to SCP significantly inhibit the anodic branch while keeping the effect on the cathodic branch negligible. Experimental results fits with Langmuir isotherm.

Key Words   
Environmentally corrosion inhibitor; Langmuir isotherm; Mild steel; Synergism; sulfachloropyridazine

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To cite this article

O. A. Hazazi , " Inhibition Of Corrosion Of Mild Steel In H2so4 Solution By Sulfachloropyridazine: Synergism By Cations And Halides. ", International Journal of Latest Research in Science and Technology . Vol. 4, Issue 2, pp 138-143 , 2015

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