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The Weight loss was employed to investigate the impact of triazole on mild-steel dissolution in 0.5 M HCl solution. The inhibitor’s inhibition efficiency was seen to increase with concentration yielding (81.61%,82.61%,88.29%,91.64%,94.32%) of (T9, T8, T6, T4, T1) at concentration 1×10-4 M HCl, at a temperature of 25°C for 240 min. At a temperature range from 25–45°C, we studied the temperature impact on the corrosion behavior, wherein the results demonstrated decrease in inhibition efficiency with rising in temperature to achieve (61.7%, 52.26%, 63.1%, 72.11%, 75.77 %) of (T9, T8, T6, T4 and T1) at a concentration of 1×10-4 M, at a temperature 45°C for 240 min. A study was also performed regarding the impact of temperature on the corrosion rate in the presence and absence of triazole. The activation energy and Kinetic parameters were calculated and discussed. Polarization curves revealed that the studied inhibitors represent a mixed – type inhibitors. Adsorption of inhibitors was found to obey Langmuir isotherm and was isotherm physisorption type.

Corrosion Inhibition of Mild-Steel in 0.5 M HCl using some prepared 1,2,3-Triazoles Derivatives