ازهار فاروق عبد الزهرة
MSc
-
lecturer
College of Education for Pure Sciences (Ibn Al-Haitham)
,
Department of Chemistry
[email protected]
Publication Date
Wed Oct 28 2020
Journal Name
Egyptian Journal Of Chemistry
Inhibition of Aluminum Alloy 7025 in Acid Solution Using Sulphamethoxazole
Keywords: Corrosion inhibition
Aluminum
Sulphamethoxazole
Free energy
Adsorption mechanism.
Corrosion behavior of aluminum alloy 7025 was investigated in hydrochloric acid (pH=1) containing 0.6 mol.dm-3 NaCl in the existence and absence of diverse concentrations of sulphamethoxazole as environmentally friendly corrosion inhibitor over the temperature range (298-313)K. Electrochemical polarization method using potentiostatic technique was employed. The inhibition efficiency has been raised with increased sulphamethoxazole concentration but lessened at temperature increases. The highest efficiency value was 96.5 at 298 K and 2 x10-4 mol.dm-3 concentration of sulphamethoxazole. The sulphamethoxazole adsorption was agreed with Langmuir adsorption isotherm. Some thermodynamic parameter (△Gads) and activation energy (Ea) were determin
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