期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2014
卷号：3
期号：3
页码：9861
出版社：S&S Publications
摘要：The inhibition effect of some Chalcone derivatives [3-(4-hydroxyphenyl)-1-phenylprop-2-en-1-one as aninhibitor (1) and 3-(4-hydroxyphenyl)-1-(4-nitrophenyl)prop-2-en-1-one as an inhibitor (2)] on the corrosion ofaluminum in 0.5 M HCl solution was studied using potentiodynamic polarization, electrochemical impedancespectroscopy (EIS), electrochemical frequency modulation (EFM) and weight loss measurements. The results drawnfrom the different techniques are comparable and exhibit small discrepancy. Results for weight loss indicated thatinhibitor efficiency (% IE) increased with increasing inhibitor concentration, reaching a maximum inhibiting power of85.9 , 95.7 % at 21 x 10-6 M for inhibitors 1 and 2, respectively and decreased with increasing the temperature.Polarization studies clearly revealed that the presence of inhibitors changes the mechanism of hydrogen evolution andthe metal dissolution i.e. they act as mixed type inhibitors. Some activation and adsorption thermodynamic parameterswere calculated and discussed. The surface coverage of the inhibitors obeyed Langmuir adsorption isotherm.
