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Study of the synergistic effect of 2-methoxy-4-formylphenol and sodium 4 molybdenum oxide on the corrosion inhibition of 3CR12 ferritic steel 5 in dilute sulphuric acid

Loto, R. T. (2017) Study of the synergistic effect of 2-methoxy-4-formylphenol and sodium 4 molybdenum oxide on the corrosion inhibition of 3CR12 ferritic steel 5 in dilute sulphuric acid. Results in Physics.

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Abstract

The synergistic effect of the corrosion inhibition properties of 2-methoxy-4-formylphenol and sodium 25 molybdenum oxide on the electrochemical property of 3CR12 ferritic stainless steel in 2M H2SO4 acid 26 solution was assessed through coupon analysis, potentiodynamic polarization technique, IR spectroscopy 27 and micro-analytical technique. Experimental data showed the combined admixture effectively inhibited 28 the steel corrosion at the concentrations analyzed with a maximum inhibition efficiency of 94.47% and 29 89.71% from coupon analysis and potentiodynamic polarization due to the electrochemical action and 30 inhibition of the steel by the ionized molecules of the inhibiting compound which influenced the mech- 31 anism of the redox reactions responsible to corrosion and surface deterioration. Results from corrosion 32 thermodynamic calculations showed chemisorption adsorption mechanism. Infrared spectroscopic 33 images exposed the functional groups of the molecules involved for the corrosion inhibition reaction. 34 Micro-analytical images showed sharp contrast in surface morphology between the inhibited and cor- 35 roded test specimens under study. Cracks, intergranular and pitting corrosion in addition to severe sur- 36 face deterioration was observed in the uninhibited samples. Inhibitor adsorption fits the Langmuir 37 isotherm model.

Item Type: Article
Uncontrolled Keywords: Ferritic steel Inhibitor Corrosion, sulphuric Adsorption
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 30 Mar 2017 10:47
Last Modified: 30 Mar 2017 10:47
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/8053

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