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Progress in Color, Colorants and Coatings - Volume:9 Issue: 3, Summer 2016

Progress in Color, Colorants and Coatings
Volume:9 Issue: 3, Summer 2016

  • تاریخ انتشار: 1395/06/15
  • تعداد عناوین: 7
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  • Editorial Broad
    Page 1
  • Ayda Shahriari, Hossein Aghajani, Ghasem Hosseini Pages 151-162
    The zirconia stabilized by 3mol % Y 2 O 3 (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 su rface 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 te st (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 . Prog. Color C olorants Coat .
    Keywords: Zirconia, Electrophoretic deposition, AZ91, Ni, P, Interlayer
  • Niyaz Mohammad Mahmoodi * Pages 163-171
    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 . Prog. Color Colorants Coat .
    Keywords: Synthesis, Nickel ferrite nanoparticle, Photocatalytic ozonation, Dye degradation, Operational parameter
  • Alireza Grayeli Korpi * Pages 173-181
    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 cm 3 min - 1 nitrogen. The prepared samples were corro sion tested in 1.0 M sulphuric acid solution using po tentiodynamic 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 corrosi on 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. Prog. Color Colorants Coat.
    Keywords: Ni thin films, Potentiodynamic, Stainless steel, Corrosion
  • Sarvenaz Ghanean, Mansoureh Ghanbar Afjeh* Pages 183-194
    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 bee n 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 adjus ted to control this relation. Thus the concentration of madder used in an unknown woolen yarn could be approximately determined with the fitted function . Prog. Color Colorants Coat.
    Keywords: Color Intensity, Derivative Spectrophotometry, Kubelka, Munk Equation, Madder
  • Davoud Beiknejad *, Mohammad Javad Chaichi, Mohammad Hossein Fatemi Pages 195-206
    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 R F 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..B r)), global topological charge index (JGT) and R autocorrelation of lag 5 / unweighted (R5u_A) of the compounds. Prog. Color Colorants Coat.
    Keywords: Disperse dyes, GA, MLR, Paper chromatography, Quantitative, structure, retention, relationship (QSRR)
  • Saied Abedini Khorrami, Mohammad Ebrahim Olya*, Fereshteh Motiee, Nasrin Khorshidi Pages 207-215
    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 inves tigated using Fourier transfo rm 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 con centration and salt on dye degradation were evaluated. The results indicated that CuO - ZnO as a photocatalyst could be used to degrade dyes from wastewa ter. Prog. Color Colorants Coat.
    Keywords: Synthesis, CuO, ZnO nanocomposite, Photocatalytic degradation, Basic dye