Schiff%26apos;s base derived from the pharmaceutical drug Dapsone (DS) as a new and effective corrosion inhibitor for mild steel in hydrochloric acid

作者：Singh Ambrish; Avyaya J N; Ebenso Eno E^*; Quraishi M A

来源：Research on Chemical Intermediates, 2013, 39(2): 537-551.

DOI：10.1007/s11164-012-0577-y

• Corrosion
• Adsorption
• Electrochemical techniques
• Quantum calculations
• Dapsone%26apos
• s Schiff%26apos
• s base with salicylaldehyde

The inhibition ability of Dapsone%26apos;s Schiff%26apos;s base with salicylaldehyde (1:2) for mild steel corrosion in 1 M HCl solution at 308 K was studied by means of potentiodynamic polarization, electrochemical impedance spectroscopy techniques, and gravimetric analysis. Results showed that Dapsone salicylaldehyde performed well as a good inhibitor for mild steel in 1 M HCl solution with maximum inhibition efficiency of 95 % at 500 ppm. The adsorption isotherm of the inhibitor followed the Langmuir adsorption. The value of free energy of adsorption showed that it is a spontaneous process and followed typical physical adsorption.

• 出版日期2013-2
• 单位西北大学