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：2
页码：591-598
出版社：University of Mohammed Premier Oujda
摘要：The inhibitive effect Carica papaya seed extract (CPSE) on the corrosion behavior of aluminium in sulphuric acid mediumof pH 2.3 was investigated by using Tafel polarization and electrochemical impedance spectroscopy (EIS) techniques in the temperature range 30 to 50°C. The concentration of inhibitors used was in the range of 100 -400ppm. The surface morphology was studied using scanning electron microscopy (SEM). Inhibition efficiency was found to increase with increase in inhibitor concentration and decrease with increase in temperature. CPSE acted as a mixed type inhibitor. Inhibito r underwent physisorption on the surface o f the metal and followed Langmuir adsorption isotherm. The kinetic and thermodynamic parameters were calculated and discussed in detail.. CPSE emerged as a potential, cost effective eco -friendly natural inhibitor for the corrosion control of aluminium in sulphuric acid medium
关键词：Aluminium ; Green inhibitor; Carica papaya; Tafel polarisation; EIS studies; SEM
