scholarly journals CORROSION RESISTANCE AND MECHANICAL PROPERTIES OF TiO2 NANOTUBES / EPOXY COATING ON STEEL SPCC-JISG 3141

2018 ◽  
Vol 55 (5B) ◽  
pp. 203
Author(s):  
Duong Thi Hong Phan
Keyword(s):  
Corrosion Resistance ◽  
Titanium Dioxide ◽  
Epoxy Resin ◽  
Tio2 Nanotubes ◽  
Mechanical Performance ◽  
In Situ Polymerization ◽  
Salt Spray ◽  
Epoxy Coating ◽  
Test Model ◽  
Titanium Dioxide Nanotubes

     Titanium dioxide nanotubes (TNTs) have been considered the promising nanostructures employed for many practical applications such as biomedical, photonic and optoelectronic devices. Coatings prepared from epoxy-nano-TiO2 nanotubes synthesized by in situ polymerization were found to exhibit excellent corrosion resistance much superior to epoxy resin in aggressive environments. The corrosion studies were carried out on steel SPCC JISG 3141 plates coated with 5 wt % and without of TiO2 nanotubes (TNTs). The synthesis of titanium dioxide nanotubes (TNTs) using hydrothermal method was investigated. The synthesized TNTs were characterized with Fourier Transform Infrared Spectroscopy (FTIR), Brunauer-Emmett-Teller (BET) specific area surface test, X-ray diffraction (XRD) and Transmission Electron Microscope (TEM) imaging. The results demonstrated a unique tubular nanostructure of TNTs shape. The mechanical performance of the nanocomposites was examined to show that the 5 wt % TNTs/epoxy coating was more impact resistance, the film hardness behavior and bending resistance than epoxy coating. The effects of TNT particles on corrosion resistance of epoxy coating were studied by salt spray test (Model SAM Y90) and compared to that of non-filler. After 144 h exposure, the corrosion resistance of epoxy resin greatly improved by using reinforcing the white pigment of TNTs. The results indicated that the coating containing TNTs shows the best protection efficiency. 

scholarly journals Hydrophobic Modification of Graphene Oxide and Its Effect on the Corrosion Resistance of Silicone-Modified Epoxy Resin

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 89
Author(s):  
Wei Yuan ◽  
Qian Hu ◽  
Jiao Zhang ◽  
Feng Huang ◽  
Jing Liu
Keyword(s):  
Contact Angle ◽  
Corrosion Resistance ◽  
Graphene Oxide ◽  
Physical Properties ◽  
Epoxy Resin ◽  
Electrochemical Impedance ◽  
Salt Spray ◽  
X Ray ◽  
Modified Graphene Oxide ◽  
Modified Epoxy

This study modified graphene oxide (GO) with hydrophilic octadecylamine (ODA) via covalent bonding to improve its dispersion in silicone-modified epoxy resin (SMER) coatings. The structural and physical properties of ODA-GO were characterized by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and contact angle tests. The ODA-GO composite materials were added to SMER coatings by physical mixing. FE-SEM, water absorption, and contact angle tests were used to evaluate the physical properties of the ODA-GO/SMER coatings, while salt spray, electrochemical impedance spectroscopy (EIS), and scanning Kelvin probe (SKP) methods were used to test the anticorrosive performance of ODA-GO/SMER composite coatings on Q235 steel substrates. It was found that ODA was successfully grafted onto the surfaces of GO. The resulting ODA-GO material exhibited good hydrophobicity and dispersion in SMER coatings. The anticorrosive properties of the ODA-GO/SMER coatings were significantly improved due to the increased interfacial adhesion between the nanosheets and SMER, lengthening of the corrosive solution diffusion path, and increased cathodic peeling resistance. The 1 wt.% ODA-GO/SMER coating provided the best corrosion resistance than SMER coatings with other amounts of ODA-GO (including no addition). After immersion in 3.5 wt.% NaCl solution for 28 days, the low-frequency end impedance value of the 1 wt.% ODA-GO/SMER coating remained high, at 6.2 × 108 Ω·cm2.

scholarly journals Corrosion Resistance of Waterborne Epoxy Resin Coating Cross-Linked by Modified Tetrabutyl Titanate

Scanning ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Lingli Xu ◽  
Zheng Chen ◽  
Fei Huang ◽  
Yinze Zuo ◽  
Xingling Shi ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Epoxy Resin ◽  
Electrochemical Impedance ◽  
Steel Substrate ◽  
Salt Spray ◽  
Tetrabutyl Titanate ◽  
Cross Linking ◽  
Cross Link ◽  
Oh Groups ◽  
Acrylic Epoxy

The development of waterborne coating is essentially important for environmental protection, and cross-linking agent is of great significance for ensuring corrosion resistance of the coating. In this work, tetrabutyl titanate was modified by ethylene glycol and tris(2-hydroxyethyl) amine and used for the solidification of waterborne acrylic-epoxy resin. Fourier-transform infrared spectroscopy (FTIR) analysis revealed that the agent reacted with OH groups first to cross-link the resin preliminarily, and then, when the amount of agent was further increased, the amino groups opened epoxide rings resulting in a secondary cross-link. Field emission scanning electron microscope (FESEM) observation and electrochemical impedance spectroscopy (EIS) test found that, when the cross-linking agent was used at 6%, the coating remains intact and kept an impedance of as high as 108Ωcm2 even after being immersed in NaCl solution for 30 days. Copper-accelerated acetic acid-salt spray (CASS) test confirmed that the coating containing 6% cross-linking agent provided the best protection for the carbon steel substrate.

scholarly journals Scaling Up the Process of Titanium Dioxide Nanotube Synthesis and Its Effect on Photoelectrochemical Properties

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5686
Author(s):  
Mariusz Szkoda ◽  
Konrad Trzciński ◽  
Zuzanna Zarach ◽  
Daria Roda ◽  
Marcin Łapiński ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Tio2 Nanotubes ◽  
Significant Contribution ◽  
Scaling Up ◽  
Photoelectrochemical Properties ◽  
Titanium Dioxide Nanotubes ◽  
Vis Spectroscopy ◽  
Show Evidence ◽  
First Time ◽  
Scanning Electron

In this work, for the first time, the influence of scaling up the process of titanium dioxide nanotube (TiO2NT) synthesis on the photoelectrochemical properties of TiO2 nanotubes is presented. Titanium dioxide nanotubes were obtained on substrates of various sizes: 2 × 2, 4 × 4, 5 × 5, 6 × 6, and 8 × 8 cm2. The electrode material was characterized using scanning electron microscopy as well as Raman and UV–vis spectroscopy in order to investigate their morphology, crystallinity, and absorbance ability, respectively. The obtained electrodes were used as photoanodes for the photoelectrochemical water splitting. The surface analysis was performed, and photocurrent values were determined depending on their place on the sample. Interestingly, the values of the obtained photocurrent densities in the center of each sample were similar and were about 80 µA·cm2. The results of our work show evidence of a significant contribution to wider applications of materials based on TiO2 nanotubes not only in photoelectrochemistry but also in medicine, supercapacitors, and sensors.

A novel cost effective fabrication technique for highly preferential oriented TiO2 nanotubes

Nanoscale ◽  
2015 ◽  
Vol 7 (48) ◽  
pp. 20386-20390 ◽  
Author(s):  
Aijo John K ◽  
Johns Naduvath ◽  
Sudhanshu Mallick ◽  
Thoudinja Shripathi ◽  
Manju Thankamoniamma ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Single Crystal ◽  
Tio2 Nanotubes ◽  
Cost Effective ◽  
Superior Performance ◽  
Fabrication Technique ◽  
Titanium Dioxide Nanotubes

Single crystal like titanium dioxide nanotubes with orientation along the (001) direction are fabricated using a novel cost effective Zn-assisted method and their superior performance as electrodes in supercapacitors is demonstrated.

Anticorrosion Epoxy Coating Enriched with Nanozinc and Montmorillonite (MMT)

2014 ◽  
Vol 695 ◽  
pp. 89-92
Author(s):  
Moazeni Nima ◽  
Mohamad Zurina ◽  
Abdul Manan Siti Najihah ◽  
Norzita Ngadi
Keyword(s):  
Corrosion Resistance ◽  
Salt Spray ◽  
Epoxy Coating ◽  
Salt Spray Test ◽  
Coated Substrate

The main objective for this research is to compare the performance of hybridization and evaluating best content of nanozinc powder/MMT enriched epoxy coating towards corrosion resistance with nanozinc dust epoxy and plain epoxy coating. The nanozinc contain is fixed at 1 wt% while MMT content was varied from 0.5, 1.0 and 1.5 wt%. The corrosion resistance of epoxy/MMT/nanozinc coated substrate was evaluated by analysis of salt spray test (ASTM B117 and D-1654).

scholarly journals Zero-Bias Visible to Near-Infrared Horizontal p-n-p TiO2 Nanotubes Doped Monolayer Graphene Photodetector

Molecules ◽  
2019 ◽  
Vol 24 (10) ◽  
pp. 1870 ◽  
Author(s):  
Zehua Huang ◽  
Chunhui Ji ◽  
Luhua Cheng ◽  
Jiayue Han ◽  
Ming Yang ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Energy Band ◽  
Tio2 Nanotubes ◽  
Near Infrared ◽  
Monolayer Graphene ◽  
Band Theory ◽  
Zero Bias ◽  
Suitable Candidate ◽  
Titanium Dioxide Nanotubes ◽  
Energy Band Theory

We present a p-n-p monolayer graphene photodetector doped with titanium dioxide nanotubes for detecting light from visible to near-infrared (405 to 1310 nm) region. The built-in electric field separates the photo-induced electrons and holes to generate photocurrent without bias voltage, which allows the device to have meager power consumption. Moreover, the detector is very sensitive to the illumination area, and we analyze the reason using the energy band theory. The response time of the detector is about 30 ms. The horizontal p-n-p device is a suitable candidate in zero-bias optoelectronic applications.

scholarly journals The Influence of the Parameters of a Gold Nanoparticle Deposition Method on Titanium Dioxide Nanotubes, Their Electrochemical Response, and Protein Adsorption

Biosensors ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 138 ◽  
Author(s):  
Ewa Paradowska ◽  
Katarzyna Arkusz ◽  
Dorota G. Pijanowska
Keyword(s):  
Corrosion Resistance ◽  
Titanium Dioxide ◽  
Salt Solution ◽  
Photoelectron Spectroscopy ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Gold Salt ◽  
Nanoparticle Deposition ◽  
Potential Measurement ◽  
Titanium Dioxide Nanotubes

The goal of this research was to find the best conditions to prepare titanium dioxide nanotubes (TNTs) modified with gold nanoparticles (AuNPs). This paper, for the first time, reports on the influence of the parameters of cyclic voltammetry process (CV) -based AuNP deposition, i.e., the number of cycles and the concentration of gold salt solution, on corrosion resistance and the capacitance of TNTs. Another innovation was to fabricate AuNPs with well-formed spherical geometry and uniform distribution on TNTs. The AuNPs/TNTs were characterized using scanning electron microscopy, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, and open-circuit potential measurement. From the obtained results, the correlation between the deposition process parameters, the AuNP diameters, and the electrical conductivity of the TNTs was found in a range from 14.3 ± 1.8 to 182.3 ± 51.7 nm. The size and amount of the AuNPs could be controlled by the number of deposition cycles and the concentration of the gold salt solution. The modification of TNTs using AuNPs facilitated electron transfer, increased the corrosion resistance, and caused better adsorption properties for bovine serum albumin.

scholarly journals Release kinetics study and anti-corrosion behaviour of a pH-responsive ionic liquid-loaded halloysite nanotube-doped epoxy coating

RSC Advances ◽  
2020 ◽  
Vol 10 (22) ◽  
pp. 13174-13184 ◽  
Author(s):  
Yap Jen Yang ◽  
Sarini Mat Yaakob ◽  
Nurul Ekmi Rabat ◽  
Muhammad Rashid Shamsuddin ◽  
Zakaria Man
Keyword(s):  
Corrosion Resistance ◽  
Ionic Liquid ◽  
Epoxy Resin ◽  
Corrosion Behaviour ◽  
Release Kinetics ◽  
Halloysite Nanotubes ◽  
Epoxy Coating ◽  
Kinetics Study ◽  
Ph Responsive ◽  
Halloysite Nanotube

Enhanced corrosion resistance was obtained for steel coated with epoxy resin doped with pH-responsive halloysite nanotubes loaded with ionic liquid.

Optical and Corrosion Studies of Spray Pyrolysis Coated Titanium Dioxide Thin Films

2018 ◽  
Vol 24 (8) ◽  
pp. 5836-5842 ◽  
Author(s):  
V. P. Muhamed Shajudheen ◽  
K. Anitha Rani ◽  
V. Senthil Kumar ◽  
A. Uma Maheswari ◽  
M Sivakumar ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Titanium Dioxide ◽  
Spray Pyrolysis ◽  
Salt Spray ◽  
Salt Spray Test ◽  
Neutral Salt ◽  
X Rays

In the present work, nanostructured thin films of titanium dioxide (TiO2) have been coated on the stainless steel (SS 304L) substrate by spray pyrolysis coating technique. The surface morphology and chemical constituents of the thin film have recorded using Field Effect Scanning Electron Microscopy (FESEM) and Energy Dispersive Analysis of X-rays (EDAX) respectively. The structural and optical properties of the films of as deposited were examined by Micro Raman, Photoluminescence Spectroscopy (PL) and UV-Vis absorption method. The FESEM micrograph showed the microporous nature of the film. EDAX spectrum illustrated the presence of Ti and O on the coated surface of the steel substrate. The peaks in the micro Raman spectrum indicated that the TiO2 samples of present study are in rutile phase of titanium dioxide. A strong emission peak around 350 nm was observed in the Photoluminescence spectrum of the samples. The anti-corrosion properties of the TiO2 coated samples were investigated by neutral salt spray test for 390 h. Electrochemical Impedance Spectroscopy (EIS) analysis and Tafel analysis were performed before and after salt spray test and the results suggested an increase of corrosion resistance of the titanium dioxide thin film in a corrosive environment. The positive shift of equilibrium corrosion potential (Ecorr) of bare stainless steel to thin film coated stainless steel (from −0.96 V to −0.38 V) in the electrochemical Tafel analysis implied the significant increase of corrosion resistance.

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