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R. Soleimani,F. Mahboubi,S.Y. Arman,M. Kazemi,A. Maniee 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.23 No.-
In this study, the effect of surfactant, phosphorus content, and concentration of SiC nanoparticle on the microstructure and protective performance of electroless Ni–P/nano-SiC coating was studied using electrochemical impedance spectroscopy as well as surface analysis. Through taking advantage of response surface methodology, the experimental results were fed into Design Expert software which then mutual relationships between three independent variables were established. Prediction of model at the experimental range using systematic data enables us to provide a better understanding of the simultaneous effect of variables on the properties of coating. Moreover the optimum concentration of variables was predicted.
M. Mehdipour,B. Ramezanzadeh,S.Y. Arman 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
The inhibition action of Aloe Vera leaf extract as environmentally friendly inhibitor for the corrosionprotection of stainless steel in 1 M H2SO4 solution was studied by electrochemical techniques as well asscanning electron microscope. The results of linear polarization and electrochemical impedancespectroscopy proved the effectiveness of Aloe Vera extract as concentration increased. Corrosioninhibition of Aloe extract was also studied by electrochemical noise (EN). Employing EN, differentaspects like transient analysis, noise resistant and characteristic charge were characterized. Moreover, aliterature review of Aloe Vera characterization using high-performance liquid chromatography and GCMSwas carried out.
Adsorption and Reaction of CO and NO on Ir(111) Under Near Ambient Pressure Conditions
Ueda, K.,Suzuki, K.,Toyoshima, R.,Monya, Y.,Yoshida, M.,Isegawa, K.,Amemiya, K.,Mase, K.,Mun, B. S.,Arman, M. A. Springer Science + Business Media 2016 Topics in catalysis Vol.59 No.5
<P>The adsorption and reaction of CO and NO on Ir(111) have been studied by near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) together with low-energy electron diffraction, scanning tunneling microscopy, and mass spectroscopy (MS). Under both ultrahigh vacuum (UHV) and NAP conditions CO molecules occupy on-top sites of the Ir(111) surface at room temperature (RT) by forming two-dimensional clusters. Exposure to NO under UHV conditions at RT induces partially dissociative adsorption, while NAP NO exposure leads to a Ir(111) surface that is covered by molecular NO. We conducted in-operando NAP-XPS/MS observation of the NO + (CO)-C-13 reaction under a NAP condition as a function of temperature. Below 210 degrees C adsorption of NO is inhibited by CO, while above 210 degrees C the CO inhibition is released due to partial desorption of CO and dissociative adsorption of NO starts to occur leading to associative formation of N-2. Under the most active condition studied here the Ir surface is covered by a dense co-adsorption layer consisting of on-top CO, atomic N and O, which suggests that this reaction is not a NO-dissociation-limited process but a N-2/CO2 formation-limited process.</P>