Triton X-100 as a Non-Ionic Surfactant for Corrosion Inhibition of Mild Steel During Acid Cleaning

Abstract

Triton-X 100 (Octylphenolpoly(ethyleneglycolether) 9-10), was investigated as corrosion inhibitor during the acid cleaning for mild steel in 5% HCl (~ 0.0137 M) by gravimetric and electrochemical polarization methods in the presence of different concentrations of Triton-X 100 of 5, 10, 20 and occasionally by 50 ppm at different of temperatures of 30, 45, and 60 °C. The gravimetric results showed maximum inhibition efficiency of ~ 77% when 50 ppm of Triton-X 100 used at 30 °C, while the potentiodynamic polarization measurements showed a maximum inhibition efficiency of ~ 63% when 20 ppm were used. The adsorption isotherms followed the Langmuir isotherm. The adsorption of TX-100 is a spontaneous process; accompanied by a decrease in entropy upon increasing the concentration of TX-100. Electrochemical polarization measurements support the finding of weight loss data. The results from this work can be useful to relevant industrial sectors of using this surfactant as corrosion inhibitor during acid cleaning.

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