Inhibition Effect of Deanol on Mild Steel Corrosion in Dilute Sulphuric Acid
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The influence of deanol on the corrosion behaviour of mild steel in dilute sulphuric acid with sodium chloride addition was
studied by means of mass-loss, potentiodynamic polarization, electrode potential monitoring, scanning electron microscopy and
statistical analysis.Results show that deanol performedexcellently with amaximuminhibition efficiency of 97.9%obtained from
the mass loss technique and 98.23%fromthe potentiodynamic polarization tests at themaximumdeanol concentration evaluated.
Polarization studies show that the amino alcohol is a cathodic type inhibitor. Adsorption of deanol on the steel surface was
observed to obey the Langmuir and Frumkin adsorption isotherms. Scanning electron microscopy studies confirmed the
corrosion protection property of deanol to be through adsorption on the mild steel surface while statistical evaluation showed the
overwhelming influence and significance of inhibitor concentration on inhibition efficiency compared with exposure time.
Keywords
T Technology (General), TJ Mechanical engineering and machinery