期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2014
卷号：5
期号：1
页码：263-270
出版社：University of Mohammed Premier Oujda
摘要：The corrosion rate in the presence of a new synthesized quinoxaline derivative namely 3 -methyl-1-prop-2-ynylquinoxalin-2(1h)-one and denoted Pr-N-Q=O as mild steel corrosion inhibitor in molar hydrochloric acid, was studied by weight loss method, in the range o f temperature from 308 to 353 K. Results obtained revealed that the inhibition efficiency of this compound decreased relatively with increasing temperature and its value reached 80.0% at 353 K at 10-3M. The inhibition was assumed to occur via adsorption of the quinoxaline molecules on metallic surface. Adsorption of Pr-N-Q=O obeyed to Langmuir adsorption isotherm model fit. The apparent activation energies Ea, enthalp y H*and entrop y of activation S*values provided evidence of the inhibitory effect of Pr-N-Q =O. Furthermore, spontaneity of the adsorption process, thro ugh free energy adsG° values showed a drastic decrease upon temperature increase in the presence Pr-N-Q=O
