Inhibition Effect of Deanol on Mild Steel Corrosion inudDilute Sulphuric Acid

摘要

The influence of deanol on the corrosion behaviour of mild steel in dilute sulphuric acid with sodium chloride addition wasudstudied by means of mass-loss, potentiodynamic polarization, electrode potential monitoring, scanning electron microscopy andudstatistical analysis.Results show that deanol performedexcellently with amaximuminhibition efficiency of 97.9%obtained fromudthe mass loss technique and 98.23%fromthe potentiodynamic polarization tests at themaximumdeanol concentration evaluated.udPolarization studies show that the amino alcohol is a cathodic type inhibitor. Adsorption of deanol on the steel surface wasudobserved to obey the Langmuir and Frumkin adsorption isotherms. Scanning electron microscopy studies confirmed theudcorrosion protection property of deanol to be through adsorption on the mild steel surface while statistical evaluation showed theudoverwhelming influence and significance of inhibitor concentration on inhibition efficiency compared with exposure time.