38 research outputs found
Surface roughness of ZnO-SiO2 nanocoating
Nanocoating acted as a barrier to avoid the transportation of corrosive species. Nanoparticles provide the resin or
coating with a continuous, solid and protective network layer. Silicon wafer p-type substrate was used as
standard materials while tungsten wire of 0.15mm diameter was used as tip for scanning operation. Nanoeducator
showed that present of nanoparticles increase the surface roughness and maintain the size of nanoparticles.
Nanoparticles well distribute in nanosize. Immersion test showed nanoparticles also, improved the adherence of the
cured epoxy coating
Influence of reaction time and synthesis temperature on the physical properties of ZnO nanoparticles synthesized by the hydrothermal method
Influence of synthesis temperature and reaction time on the structural and optical properties of ZnO nanoparticles synthesized by the hydrothermal method was investigated using X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray, Fourier transform infra-red spectroscopy, and UV–visible and fluorescence spectroscopy. The XRD pattern and HR-TEM images confirmed the presence of crystalline hexagonal wurtzite ZnO nanoparticles with average crystallite size in the range 30–40 nm. Their energy gap determined by fluorescence was found to depend on the synthesis temperature and reaction time with values in the range 2.90–3.78 eV. Thermal analysis, thermogravimetric and the differential scanning calorimetry were used to study the thermal reactions and weight loss with heat of the prepared ZnO nanoparticles
Surface roughness of zno-sio2 nanocoating
Nanocoating acted as a barrier to avoid the transportation of corrosive species. Nanoparticles provide the resin or coating with a continuous, solid and protective network layer. Silicon wafer p-type substrate [removed] was used as standard materials while tungsten wire of 0.15mm diameter was used as tip for scanning operation. Nanoeducator showed that present of nanoparticles increase the surface roughness and maintain the size of nanoparticles. Nanoparticles well distribute in nanosize. Immersion test showed nanoparticles also, improved the adherence of the cured epoxy coating
Synthesis of SiO2 nanostructures using sol-gel method
Sol-gel method is the simplest method and has the ability to control the particle size and morphology through
systematic monitoring of reaction parameters. The objective of this research is to synthesize silica nanostructures
by sol-gel method and to characterize the synthesized silica nanostructures. Silica nanoparticles were synthesized
via the sol-gel method using Tetraethyl orthosilicate as a precursor. The acetic acid and distilled water were used as
the catalyst and the hydrolyzing agent. Varied parameters of the study were the aging time in the range of 2 to 6 h
and the calcination temperature in the range of 600–700 ◦C. The obtained silica nanopowder was characterized
using FESEM, and Nano-Particle Size Analyzer. The results show that the silica nanospheres were successfully
synthesized by using sol-gel method with the optimum parameters of 700 ◦C of calcination temperature and 2 h of
aging time. The average size of silica nanoparticles was in the range of 79.68 nm to 87.35 nm
Synthesis of SiO 2
Sol-gel method is the simplest method and has the ability to control the particle size and morphology through systematic monitoring of reaction parameters. The objective of this research is to synthesize silica nanostructures by sol-gel method and to characterize the synthesized silica nanostructures. Silica nanoparticles were synthesized via the sol-gel method using Tetraethyl orthosilicate as a precursor. The acetic acid and distilled water were used as the catalyst and the hydrolyzing agent. Varied parameters of the study were the aging time in the range of 2 to 6 h and the calcination temperature in the range of 600-700°C. The obtained silica nanopowder was characterized using FESEM, and Nano-Particle Size Analyzer. The results show that the silica nanospheres were successfully synthesized by using sol-gel method with the optimum parameters of 700°C of calcination temperature and 2 h of aging time. The average size of silica nanoparticles was in the range of 79.68 nm to 87.35 nm
Hardness and adhesion performances of nanocoating on carbon steel
Nanocoatings industry has been aggressive in searching for cost-effective
alternatives and environmental friendly approaches to manufacture products. Nanocoatings
represent an engineering solution to prevent corrosion of the structural parts of ships, insulation
and pipelines industries. The adhesion and hardness properties of coating affect material
properties. This paper reviews ZnO-SiO2 as nanopowder in nano coating formulation as the
agent for new and improved coating performances. Carbon steel on type S50C used as
common substrate in nanocoating industry. 3wt% ZnO and 2wt% SiO2 addition of
nanoparticles into nanocoating showed the best formulation since hardness and adhesion of
nanocoating was good on carbon steel substrate. Incorporation of nanoparticles into coating
increased the performances of coating
ZnO nanoparticles for anti-corrosion nanocoating of carbon steel
Nanostructured coatings offer great potential for various applications due to their superior characteristics that are not typically found in conventional coatings. This research aimed at developing a new and improved coating that employs zinc oxide nanopowder as the agent to achieve corrosion resistant properties for a coating. The research project discusses on its corrosion behaviour of epoxy-zinc oxide in different media by measuring its corrosion rate. Mild carbon steel was used as the substrate for the epoxy-zinc oxide coating. The corrosion behavior mechanism of mild steel was investigated in different media, namely fresh water, NaCl solution, HCl solution and NaOH solution. Immersion test was conducted and studied for a period of 60 days, with daily and weekly weighing and immersing. The corrosion rate was calculated and mild steel corrodes in the different environment and degrades in the following trend; HCl → NaCl → NaOH → H2O