ORIGINAL_ARTICLE
Corrosion Resistance Enhancement of AZ91 Magnesium Alloy Using Ni-P Interlayer and Electrophoretic Deposited 3YSZ Coating
The zirconia stabilized by 3mol % Y2O3 (3YSZ) was applied onto the surface of the magnesium alloy AZ91D using electrophoretic deposition (EPD) from a non- aqueous solution. A Ni-P interlayer between the substrate and YSZ coating was also prepared by electroless plating. Finally, coatings were heat treated in control atmosphere at 400 °C. The preparation, microstructure and corrosion resistance of the coatings were investigated. Scanning electron microscope (SEM) was used to investigate the morphology of coatings. In addition, compositions of surface were determined by X-ray diffraction (XRD). The corrosion resistance of the coatings was evaluated by electrochemical impedance spectroscopy (EIS) in 3.5% NaCl solution. Also, the stability of coating was investigated by the Rockwell C indentation test (VDI 3198 norm). The results indicate that Ni-P interlayer can improve the quality of zirconia coating on the surface. Also, the Ni-P interlayer and YSZ coating increase the charge-transfer resistance of AZ91D surface in chloride solution.
https://pccc.icrc.ac.ir/article_75882_9f46439100092b03178c0fbdedc1e62a.pdf
2016-07-01
151
162
10.30509/pccc.2016.75882
Zirconia
Electrophoretic deposition
AZ91
Ni
P
Interlayer
A.
Shahriari
aydashahriari@tabrizu.ac.ir
1
Department of Materials Engineering,Faculty of Mechanical Engineering, University of Tabriz
AUTHOR
H.
Aghajani
h_aghajani@tabrizu.ac.ir
2
Department of Materials Engineering,Faculty of Mechanical Engineering, University of Tabriz
AUTHOR
M.Gh.
Hosseini
mg-hosseini@tabrizu.ac.ir
3
Department of Physical Chemistry,Electrochemistry Research Laboratorymistry, Tabriz university
AUTHOR
ORIGINAL_ARTICLE
Photocatalytic Degradation of Textile Dyes Using Ozonation and Magnetic Nickel Ferrite Nanoparticle
Dye photodegradation using ozone and Nickel ferrite nanoparticle (NFN) as a photocatalyst was studied. The catalyst was synthesized and characterized by FT-IR, SEM and XRD. Textile dyes including Remazol Red RB (RRRB) and Direct Green B (DGB) were degraded as model compounds. Dye degradation was investigated using UV–Vis and ion chromatography (IC) analyses. The effect of catalyst dosage, pH, salt and initial dye concentration on decolorization was studied. Carboxylic acids were detected as intermediates. It can be concluded that Nickel ferrite nanoparticle could be used as an effective catalyst for photocatalytic ozonation of dyes in colored wastewater.
https://pccc.icrc.ac.ir/article_75883_70d96089a7c46ec2d3a2baf7fe7f4cd3.pdf
2016-07-01
163
171
10.30509/pccc.2016.75883
Synthesis
Nickel ferrite nanoparticle
Photocatalytic ozonation
dye degradation
Operational parameter
N.M.
Mahmoodi
mahmoodi@icrc.ac.ir
1
Department of Environmental Research, Institute for Color Science and Technology
AUTHOR
ORIGINAL_ARTICLE
Corrosion Behaviour of Nickel Coated AISI 316 Stainless Steel as a Function of Annealing Temperature
AISI 316 stainless steels were coated with 250 nm Ni film by electron beam deposition and post-annealed at different temperatures with a nitrogen flow of 600 cm3min-1 nitrogen. The prepared samples were corrosion tested in 1.0 M sulphuric acid solution using potentiodynamic technique. Crystallographic and morphological structure of the samples were analyzedanalysed by X-ray diffraction (XRD) and atomic force microscopy (AFM) respectively before corrosion test, and scanning electron microscope (SEM) after corrosion test. A clear correlation between the physical analyses (XRD, AFM and SEM) and the potentiodynamic results was is achieved. It is found that both surface roughness and the annealing temperature have important role on corrosion resistance performance of the samples produced in this work and the optimum results can be obtained at annealing temperature of 623 K for AISI 316 samples where both surface roughness and temperature (diffusion effect) have reached their critical values.
https://pccc.icrc.ac.ir/article_75884_04e9a209715650c2231efdfb3f8e40b1.pdf
2016-07-01
173
181
10.30509/pccc.2016.75884
Ni Thin Films
Potentiodynamic
Stainless steel
corrosion
A.R.
Grayeli Korpi
grayli@ut.ac.ir
1
Physics and Accelerators Research School, Nuclear Sciences and Technology Research Institute
AUTHOR
ORIGINAL_ARTICLE
Application of Derivative Spectrophotometry to Determine the Relation Between Color Intensity and Dye Concentration of Madder
The Derivative Spectrophotometry usually improves resolution bands, eliminates the influence of background and provides more defined fingerprints than original spectra, hence enhancing the detectability of minor spectral features. In this work, different madder types were collected and applied for dyeing woolen yarns used in Persian carpet in conventional pre-mordanting and dyeing process with different amounts of the dye. The second derivative of the Kubelka-Munk function of dyed samples has been calculated and implemented for eliciting a function that relates the color intensity of madder to dye concentration used in dyeing of Persian woolen carpets. It was found that for all selected madders, an exponential function could be appropriately adjusted to control this relation. Thus the concentration of madder used in an unknown woolen yarn could be approximately determined with the fitted function.
https://pccc.icrc.ac.ir/article_75885_0ec9c0573a622c39c0f5574174c35fa9.pdf
2016-07-01
183
194
10.30509/pccc.2016.75885
Color intensity
Derivative Spectrophotometry
Kubelka
Munk Equation
Madder
S.
Ghanean
sarvenaz.ghanean@gmail.com
1
Department of Textile Engineering, Amirkabir University of Technology
AUTHOR
M.
Ghanbar Afjeh
ghanbar@aut.ac.ir
2
Department of Textile Engineering, Amirkabir University of Technology
AUTHOR
ORIGINAL_ARTICLE
QSRR Study of Organic Dyes by Multiple Linear Regression Method Based on Genetic Algorithm (GA–MLR
Quantitative structure-retention relationships (QSRRs) are used to correlate paper chromatographic retention factors of disperse dyes with theoretical molecular descriptors. A data set of 23 compounds with known RF values was used. The genetic algorithm-multiple linear regression analysis (GA-MLR) with three selected theoretical descriptors was obtained. The stability and predictability of the model was validated by use of leave-one-out (LOO), leave-many-out (LMO) cross-validation, external validation, Y-randomization and applicability domain (AD) analysis. The GA-MLR revealed a statistically meaningful model showing the dependence of the RF value on sum of topological distances between N and Br atoms (T(N..Br)), global topological charge index (JGT) and R autocorrelation of lag 5 / unweighted (R5u_A) of the compounds.
https://pccc.icrc.ac.ir/article_75886_bbfa2a13204db42df7e10c126980288d.pdf
2016-07-01
195
206
10.30509/pccc.2016.75886
Disperse dyes
GA
MLR
Paper chromatography
Quantitative structure
retention relationship (QSRR)
M. J.
Chaichi
jchaichi@yahoo.com
1
Faculty of Chemistry, University of Mazandaran
AUTHOR
M. H.
Fatemi
mhfatemi@umz.ac.ir
2
Faculty of Chemistry, University of Mazandaran
AUTHOR
ORIGINAL_ARTICLE
Synthesis of CuO-ZnO Nanocomposite and Its Photocatalytic Activity
In this paper, CuO-ZnO nanocomposite was synthesized and its photocatalytic dye degradation ability from colored wastewater was studied. Basic Red 18 (BR18) and Basic Violet 16 (BV16) were used as model dyes. The characteristics of CuO-ZnO of were investigated using Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscope (SEM) and X-ray diffraction (XRD). Photocatalytic dye degradation by CuO-ZnO was studied by UV-Vis spectrophotometer. The effects of CuO-ZnO dosage, initial dye concentration and salt on dye degradation were evaluated. The results indicated that CuO-ZnO as a photocatalyst could be used to degrade dyes from wastewater.
https://pccc.icrc.ac.ir/article_75887_36833e8cd013ef27899e20f636c15541.pdf
2016-07-01
207
215
10.30509/pccc.2016.75887
Synthesis
CuO
ZnO nanocomposite
Photocatalytic degradation
Basic dye
S.
Abedini khorrami
s_khorrami@iau-tnb.ac.ir
1
Department of Chemistry, Islamic Azad University
AUTHOR
M. E.
Olya
olya-me@icrc.ac.ir
2
Department of Environmental Research, Institute for Color Science and Technology
AUTHOR
F.
Motiee
f_motiee@iau-tnb.ac.ir
3
Department of Chemistry, North Tehran Branch, Islamic Azad University
AUTHOR
N.
Khorshidi
nasrin_khor@yahoo.com
4
Department of Chemistry, North Tehran Branch, Islamic Azad University
AUTHOR