A New and Effective Macrocyclic compound as corrosion inhibitor for mild Steel in Hydrochloric Acid Solution

作者：Quraishi M A^*; Ansari K R; Ebenso Eno E

来源：International Journal of Electrochemical Science, 2012, 7(12): 13106-13120.

• Mild steel (MS)
• Corrosion inhibition
• EIS
• Adsorption

The inhibition characteristics of a macrocylic compound namely 1, 2, 4, 7, 9, 10-hexaazacyclo-pentadeca-10, 15-dien-3, 5, 6, 8-tetraone (HPTT) has been investigated on acid corrosion of mild steel in 1 M HCl using gravimetric measurement, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. The maximum inhibition efficiency (eta %) 95.2% of HPTT was obtained at 200 mgL(-1). Polarization curves indicate that HPTT acts as a mixed type inhibitor. The adsorption of inhibitor on mild steel surface followed Langmuir isotherm. Thermodynamic adsorption parameters such as adsorption heat (Delta H degrees(ads)), adsorption entropy (Delta S degrees(ads)) and adsorption free energy (Delta G degrees ads) have been calculated and discussed.

• 出版日期2012-12
• 单位西北大学