Sol-Gel Derived TiO2 Coating for Chemical Protection of Stainless Steel

2005 ◽  
Vol 486-487 ◽  
pp. 5-8 ◽  
Author(s):  
Dae Yong Shin ◽  
Kyung Nam Kim ◽  
Sang Mok Han
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Sol Gel ◽  
Dip Coating ◽  
Chemical Corrosion ◽  
Steel Sheets ◽  
Electrochemical Parameters ◽  
Tio2 Sol ◽  
Dip Coating Technique

Sol-gel coatings of TiO2 have been prepared from TiO2 sol and deposited by a dip-coating technique on 316L stainless steel sheets to study their electrochemical behavior in corrosive solutions. The influence of the coatings on the chemical corrosion of the substrate was evaluated by potentiodynamic polarization curves in different aqueous NaCl solution at 25°C. Comparative tests were performed on uncoated one. The thickness of the TiO2 coatings varied from 0.5~0.8 µm. The values of the electrochemical parameters allow for an explanation of the role of the TiO2 films in the increased resistance of stainless steel against corrosion in moderately aggressive environments.

scholarly journals Corrosion Resistant ZrO2 Sol-Gel Coating on Stainless Steel

1992 ◽  
Vol 271 ◽  
Author(s):  
M. Atik ◽  
M. A. Aegerter
Keyword(s):  
Stainless Steel ◽  
Sol Gel ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Corrosion Resistant ◽  
Steel Sheets ◽  
Chemical Attack ◽  
316 L Stainless Steel ◽  
Zro2 Sol ◽  
Dip Coating Technique

ABSTRACTCorrosion resistant Sol-Gel ZrO2, coatings deposited by dip coating technique on 316 L stainless steel sheets have been fabricated utilizing sonocatalysed precursors sols prepared from zirconium alkoxide Zr(OC3H7)4, isopropanol, glacial acetic acid and water. Their composition varied between 0,025 to 0,9 mol/1 ZrO2. The coatings have been characterized by X-ray diffraction, IR optical reflection, ellipsometry and scanning electron microscopy. When densified under a slow heat treatment thin coatings exhibit outstanding corrosion resistance as no weight change has been observed after 24 h chemical attack in H2SO4 aqueous solution at 81°C and 10 h oxidation treatment in air at 800°C. Thick films as well as films densified under rapid heat treatments tend to crack and are less corrosion resistant.

Preparation of uniform TiO2 nanostructure film on 316L stainless steel by sol–gel dip coating

2009 ◽  
Vol 255 (20) ◽  
pp. 8328-8333 ◽  
Author(s):  
N. Barati ◽  
M.A. Faghihi Sani ◽  
H. Ghasemi ◽  
Z. Sadeghian ◽  
S.M.M. Mirhoseini
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Sol Gel ◽  
Dip Coating ◽  
Tio2 Nanostructure

Application of Nanometer TiO2 Photocatalysis Material in Air Purification

2007 ◽  
Author(s):  
Haiyan Hou ◽  
Dongsheng Zhu ◽  
Jun Cheng
Keyword(s):  
Sol Gel ◽  
Dip Coating ◽  
Woven Fabric ◽  
Air Purification ◽  
Tio2 Photocatalysis ◽  
Composite Support ◽  
Tio2 Sol ◽  
Optimum Formulation ◽  
Oil Mist ◽  
Dip Coating Technique

The production of oil mist in machinery processing workshop is harmful. To control concentration of oil mist, the TiO2 which can treat with manifold organic pollutants is used to purify oil mist. At first, the nanometer TiO2 is prepared using the sol-gel method on the optimum formulation that showed a higher activity. Then it is treated by dip-coating technique using the non-woven fabric as composite support. The efficiency of suppression of oil mist is compared with ordinary materials. With the increase of time, the purification of the nanometer TiO2 photocatalyst sieve against oil mist of non-woven fabric is investigated in solar radiation at room temperature. It oxidizes pollutants of oil mist to CO2 and H2O. The experiments demonstrat oil mist is oxidized on the TiO2 sol at the 22nd minute with a maximum capacity of 0.3219g. It infers from the experiments the photodegradation effect is high and the reaction is fast. It also concludes that the nanometer TiO2 photocatalysis material is an ideal material for suppressing oil mist in air. At last, a status the application of technology in air purification as well as its problems and trends are presented. The technique has a promising prospect to solve the increasing air problem of the workshop.

Interphase Study By Xps of Sol-Gel ZrO2 Coatings On Stainless Steel

1994 ◽  
Vol 346 ◽  
Author(s):  
Jean-Francois Quinson ◽  
Chantal Chino ◽  
Anne-Marie De Becdelievre ◽  
Christian Guizard
Keyword(s):  
Stainless Steel ◽  
Ceramic Coating ◽  
Sol Gel ◽  
Dip Coating ◽  
Composition Variation ◽  
Bulk Substrate ◽  
Starting Solutions ◽  
Main Components ◽  
Dip Coating Technique ◽  
Alkoxide Route

ABSTRACTZrO2 coatings were obtained by the the alkoxide route and deposited onto stainless steel using the dip coating technique. The starting solutions were prepared by mixing zirconium tetrabutoxide, isopropanol, acetylacetone. The water content for the hydrolitic reaction arose from the atmosphere moisture.Useful information for the structural organization of the zirconia/steel interphase is given by XPS analysis.It is found that during firing treatment, the main components (Fe, Cr, Ni) of the stainless steel diffuse into the ceramic coating. XPS data allow to describe the chemical composition variation from the bulk substrate to the outer coating surface.

scholarly journals Aqueous Sol-Gel Synthesis of Different Iron Ferrites: From 3D to 2D

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1554
Author(s):  
Justinas Januskevicius ◽  
Zivile Stankeviciute ◽  
Dalis Baltrunas ◽  
Kęstutis Mažeika ◽  
Aldona Beganskiene ◽  
...  
Keyword(s):  
Magnetic Measurements ◽  
Substrate Surface ◽  
Sol Gel ◽  
Synthesis Method ◽  
Xrd Analysis ◽  
Dip Coating ◽  
Yttrium Iron ◽  
Iron Garnet ◽  
Dip Coating Technique ◽  
Sol Gel Synthesis

In this study, an aqueous sol-gel synthesis method and subsequent dip-coating technique were applied for the preparation of yttrium iron garnet (YIG), yttrium iron perovskite (YIP), and terbium iron perovskite (TIP) bulk and thin films. The monophasic highly crystalline different iron ferrite powders have been synthesized using this simple aqueous sol-gel process displaying the suitability of the method. In the next step, the same sol-gel solution was used for the fabrication of coatings on monocrystalline silicon (100) using a dip-coating procedure. This resulted, likely due to substrate surface influence, in all coatings having mixed phases of both garnet and perovskite. Thermogravimetric (TG) analysis of the precursor gels was carried out. All the samples were investigated by X-ray powder diffraction (XRD) analysis. The coatings were also investigated by scanning electron microscopy (SEM), atomic force microscopy (AFM) and Mössbauer spectroscopy. Magnetic measurements were also carried out.

scholarly journals Development of Adhesive, Bioactive and Antibacterial Titania Sol-Gel Coating on Titanium Substrate by Dip-Coating Technique

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 243
Author(s):  
Diana Horkavcová ◽  
Quentin Doubet ◽  
Gisèle Laure Lecomte-Nana ◽  
Eva Jablonská ◽  
Aleš Helebrant
Keyword(s):  
Simulated Body Fluid ◽  
Body Fluid ◽  
Sol Gel ◽  
Titanium Substrate ◽  
Dip Coating ◽  
Coating Technique ◽  
Metal Implants ◽  
Excellent Adhesion ◽  
Titania Sol ◽  
Dip Coating Technique

The sol-gel method provides a wide variety of applications in the medical field. One of these applications is the formation of coatings on the metal implants. The coatings containing specific additive can enhance or improve the existing surface properties of the substrate. In this work, titania sol-gel coatings were doped with two forms of silver (AgNO3, Ag3PO4) and synthetic hydroxyapatite and applied on the titanium samples by dip-coating technique. After drying and slow firing, all coatings were characterized with scanning electron microscopy. Thin coatings were successfully prepared with excellent adhesion to the substrate (measured by ASTM D 3359-2), despite cracks. Coatings containing silver and hydroxyapatite demonstrated a 100% antibacterial effect against Escherichia coli after 24 h. The bioactivity of the coatings containing hydroxyapatite tested in modified simulated body fluid under static-dynamic conditions was confirmed by bone-like hydroxyapatite precipitation. To better understand the interaction of the coatings with simulated body fluid (SBF), changes of Ca2+ and (PO4)3− ions concentrations and pH values were studied.

The role of deformation mechanisms in flow localization of 316L stainless steel

2006 ◽  
Vol 356 (1-3) ◽  
pp. 70-77 ◽  
Author(s):  
Xianglin Wu ◽  
Xiao Pan ◽  
James C. Mabon ◽  
Meimei Li ◽  
James F. Stubbins
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Deformation Mechanisms ◽  
Flow Localization

Synthesis and Characterization of Y2O3:Eu3+ Film Derived by Sol-Gel Processing

2007 ◽  
Vol 336-338 ◽  
pp. 593-596
Author(s):  
Chun Yang ◽  
Jun Ying Zhang ◽  
Hai Bing Feng ◽  
Wei Chang Hao ◽  
Tian Min Wang
Keyword(s):  
Raw Materials ◽  
Sol Gel ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Dip Coating ◽  
Organic Additive ◽  
Excitation Spectra ◽  
Excitation Peak ◽  
Close Relationship ◽  
Dip Coating Technique

Y2O3:Eu3+ thin film was synthesized by sol-gel method with inorganic salt raw materials, and the crystal structure and luminescent properties were investigated. By adding organic additive to the sol, a homogeneous film with high luminescent intensity could be obtained by dip-coating technique on the surface of alumina sheet and quartz glass. Structures of the films were studied by XRD and SEM. The excitation spectra of the films showed a wide excitation peak from 200nm to 260nm, and the emission spectra had a strongest emission peak at 611nm which revealed a close relationship with the calcining temperature.

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