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111.
Rajendra S. Jadhav Dilip G. Hundiwale Pramod P. Mahulikar 《Journal of Coatings Technology and Research》2010,7(4):449-454
Protection of oxidizable metals against corrosion has now being intensively investigated, by applying or developing different
methods such as coatings and conversion films; however, all reported methods involve environmentally hazardous materials.
Conducting polymers have now been used as corrosion inhibitor coatings that are either chemically or electrochemically deposited
on the metal substrate. The application of nanotechnology in the corrosion protection of metals has recently gained momentum.
Environmental impact can also be improved by utilizing nanostructure particulates in coatings and eliminating the requirement
of toxic solvents. We report here the synthesis of nanoparticles of polyaniline (PANI) and poly-o-anisidine (POA) using emulsion polymerization method in micellar solution of SDS and their anticorrosive property has been
experimentally checked. The prepared nanoparticles have been characterized by FTIR and TEM. The nanoparticles of the synthesized
polymers were dispersed in alkyd paint formulation for coatings on the metal surface (mild steel). The water absorption in
the prepared coatings was also studied. The corrosion rate of polymeric film was determined by weight loss measurement and
the surface morphology was examined by SEM. The nano PANI/Alkyd coatings showed considerable protection against corrosion
than the POA/alkyd coatings. 相似文献
112.
Superparamagnetic monodisperse Mg0.8Mn0.2Fe2O4 nanoparticles have been successfully synthesized in liquid polyol at elevated temperature of 200 °C. Diethylene glycol(DEG) used here plays dual role in synthesis as it acts as reducing agent and alternatively coats the surface of nanoparticles while synthesis and thereby maintaining uniform size and dispersibility. Powder X-ray diffraction(XRD) and magnetic measurements showed that the sample is cubic spinel and superparamagnetic at room temperature. Raman spectra confirmed the formation of the Mg0.8Mn0.2Fe2O4 nanoparticles.The nanoparticles exhibit very good stability in water due to in situ coating with DEG molecules. 相似文献
113.
114.
Umesh U. Jadhav Hong Hocheng Wen-Hsin Weng 《Journal of Materials Processing Technology》2013,213(9):1509-1515
The biologically produced ferric sulfate (in the form of bacterial culture supernatant) was used for machining of copper metal workpiece. A 27.04 mg/h cm2 average specific metal removal rate was achieved during oxidation of copper workpiece. The leaching performance of culture supernatant was comparable to that of microbial cells indicating that an indirect non-contact leaching mechanism is predominant for metal solubilization. The surface of copper workpiece was analyzed by scanning electron microscopy before and after oxidation. The changes in surface appearance were found during oxidation of copper. Also the change in surface roughness was observed during machining process. The quality of the surface produced is a very important aspect of the performance of the manufacturing process. Therefore the present study characterizes an effect of various physicochemical parameters on specific metal removal rate and surface roughness. An increasing concentration of FeSO4, shaking speed and volume of culture supernatant showed pronounced effect on metal removal and surface roughness. At the same time an application of varying temperatures showed little effect. 相似文献
115.
Patil Pradip D. Jadhav Swapnil A. Raut A. V. Saraf Tukaram Kavade R. B. 《Journal of Materials Science: Materials in Electronics》2022,33(26):20577-20593
Journal of Materials Science: Materials in Electronics - In the current study, we looked into the effects of simultaneous trivalent Ce and divalent Zn doping on the optical, magnetic, and... 相似文献
116.
Priyanka U. Londhe Ashwini B. Rohom Ganesh R. Bhand Sujata Jadhav Manorama G. Lakhe Nandu B. Chaure 《Journal of Materials Science: Materials in Electronics》2017,28(7):5207-5214
Zinc sulfide (ZnS) thin films have been deposited onto fluorine doped tin oxide and microscopic glass substrates from an aqueous alkaline reaction by chemical bath deposition. The effect of concentrations of hydrazine hydrate (HyH) (complexing agent) on the deposit is studied. X-ray analysis confirm the growth of nanocrystalline ZnS thin films with reflections (111), (220) and (311) correspond to cubic crystalline phase. TEM results support the growth of cubic ZnS layers. The energy band gap was successfully tailored from 2.77 to 3.80 eV. Photoluminescence study indicates a strong band-edge emission with some defect like vacancies. It was also noticed that HyH plays an important role on the nucleation. The remarkable improvement in the growth rate of ZnS thin films have been observed upon increasing the contents of HyH. Nearly stoichiometric ZnS layer was obtained upon annealing prepared with 2.5 M HyH. The crystallinity was found to be increased upon annealing the layers. The ideality factor for the ZnS layers prepared with 0 and 1.0 M HyH were obtained?~1.71 and 1.24, respectively. The capacitance–voltage plots behave according to Schottky–Mott theory. The doping concentrations?~1017 and 1018 cm?3 were calculated for the layers deposited with 0 and 1.0 M HyH, respectively. 相似文献
117.
Chhatrala Risil Patil Shailaja Lahudkar Swapnil Jadhav Dattatray V. 《Pattern Analysis & Applications》2019,22(2):505-518
Pattern Analysis and Applications - Distinct and unique ways of walking have attracted the attention of researchers for identification of different individuals. The Gait; the walking video sequence... 相似文献
118.
The influence of sodium hexametaphosphate (SHMP) and trisodium citrate (TSQ on the cookability of split cotyledons (dhal) of pigeon pea was studied. The former was found to be more effective in reducing the cooking time than the latter chemical when added to the cooking water at (85 ± 1)°C at 2% level of concentration. Influence of certain physicochemical treatments involving presoaking, freezing, thawing, and controlled drying on the cookability of the pigeon pea dhal was also investigated. Presoaking in a salt solution followed by either controlled drying alone or freezing, thawing and controlled drying in succession resulted in quick-cooking dhal. 相似文献
119.
120.
S. R. Nimbore D. R. Shengule S. J. Shukla G. K. Bichile K. M. Jadhav 《Journal of Materials Science》2006,41(19):6460-6464
Polycrystalline yttrium lanthanum iron garnets (Y3La
x
Fe5-x
O12) with varying La substitution (0 ≤ x ≤ 0.5) have been prepared in the pellet form, and studied by X-ray diffraction, magnetization, a.c. susceptibility and electrical resistivity measurements. The lattice constants are determined and the applicability of Vegard’s law has been tested. The saturation magnetization (4 πM
S) decreases very slowly almost linearly with increasing x from x = 0.0–0.5 indicating minimal reduction in ferrimagnetism and least magnetic loss. Variation of saturation magnetic moment per formula unit at 300 K with x can be explained satisfactorily assuming the collinear spin-ordering model. The Curie temperature (T
c) reduces very slowly with increasing x, which is consistent with the observed decrease in 4 πM
S with x. The activation energy (E) decreases very slowly with increasing x for x > 0.1. 相似文献