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The electrochemical behaviour of zinc electrode corrosion in hydrochloric acid solution | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 36, 2014, Pages 634-647 | ||
| Authors | ||
| Farah Safi Khlwy; Qhatan Adnan Yousif Al-kafaje | ||
| Abstract | ||
| Abstract The effect of 4-amino-2,3dimethyl-1-phenyl 3-pyrazoline 5-one inhibitor at various concentration on the electrochemical corrosion of zinc electrode in o.1 mol dm-3 aerated hydrochloric acid solution at over temperatures range from 293.15 K to 313.15K was studied using Potentiostat technique . The percentage of protection efficiencies were decreased with increasing the various concentration of 4-amino-2,3dimethyl-1-phenyl 3-pyrazoline 5-one inhibitor and with increased the temperatures . Thus , the accelerating effect of the extent of 4-amino-2,3dimethyl-1-phenyl 3-pyrazoline 5-one inhibitor concentration was noticed when the corrosion current densities (icorr.) became higher as compared with corrosion current densities in the absence of inhibitor . The kinetics of the corrosion followed Arrhenius type rate equation . The compensation effect were discussed according to the linear relationship between the values of Log A and the corresponding values of Ea . Furthermore , The values of the thermodynamics quantities ( ∆G , ∆H , ∆S ) were estimated and discussed to enhanced the corrosion inhibition process . | ||
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