scholarly journals An investigation on titania multilayer coatings for enhanced corrosion resistance of carbon steel in simulated seawater by sol–gel dip coating

2019 ◽  
Vol 8 (6) ◽  
pp. 6400-6406 ◽  
Author(s):  
Lai Xuan Bach ◽  
Doan Van Thuan ◽  
Vu Thi Hanh Thu ◽  
Thang Bach Phan ◽  
Nguyen Si Hoai Vu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Sol Gel ◽  
Dip Coating ◽  
Multilayer Coatings ◽  
Simulated Seawater

Effect of Nanoparticle Addition in Hybrid Sol-Gel Silane Coating on Corrosion Resistance of Low Carbon Steel

2013 ◽  
Vol 686 ◽  
pp. 244-249 ◽  
Author(s):  
Poovarasi Balan ◽  
Aaron Ng ◽  
Chee Beng Siang ◽  
R.K. Singh Raman ◽  
Eng Seng Chan
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Electrochemical Impedance ◽  
Sol Gel ◽  
Low Carbon Steel ◽  
Electrochemical Corrosion ◽  
Alumina Nanoparticles ◽  
Low Carbon ◽  
Silane Coating ◽  
Sol Gel Films

Chromium pre-treatments of metal have been replaced by silane pre-treatments as more environmental friendly option. Nanoparticles can be added in the silane sol-gel network have been reported to improve corrosion resistance. In this work, the electrochemical corrosion resistance of low carbon steel coated with hybrid organic-inorganic sol-gel film filled with nanoparticles was evaluated. The sol-gel films have been synthesized from 3-glycidoxy-propyl-trimethoxy-silane (3-GPTMS) and tetra-ethyl-ortho-silicate (TEOS) precursors. These films have been impregnated with 300 ppm of silica or alumina nanoparticles. The electrochemical behavior of the coated steel was evaluated by means of electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). Equivalent circuit modeling, used for quantifying the EIS measurements showed that sol-gel films containing silica nanoparticles improved the barrier properties of the silane coating. The silica nanoparticle-containing films showed highest initial pore resistance over the five days of immersion in 0.05M NaCl.

Effect of Sol-Gel Film on the Corrosion Resistance of Low Carbon Steel Plate

2020 ◽  
Vol 984 ◽  
pp. 43-50
Author(s):  
Hua Yuan Zhang ◽  
Can Wang ◽  
Bing Xue ◽  
Jing Luo
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Steel Plate ◽  
Salt Spray ◽  
Sol Gel ◽  
Low Carbon Steel ◽  
Corrosion Current ◽  
Neutral Salt ◽  
Low Carbon ◽  
Gel Film

To improve the corrosion resistance on Q235 low carbon steel, in this paper, tetraethyl orthosilicate (TEOS), N-dodecyl trimethoxysilane and γ-(2,3-epoxypropoxy) propytrimethoxysilane (KH560) were used to make organic-inorganic hybrid sol-gel film. Cross cut test adhesion method, neutral salt spray test, electrochemical test and film protective efficiency were taken to value the corrosion resistance property. The corrosion topography was studied by optical microscope. In addition, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) curves and equivalent electric circuit fitting were used to analyze the corrosion mechanism. The cross cut adhesion of sol-gel film can reach 1 class and the protection class can attain 5 class after 72 hours neutral salt spray test. According to the potentiodynamic polarization curve analysis, the corrosion potential of sol-gel film coating sample after 0.5 hours immersion was -0.46 V (vs. SCE) on the 0.1 Hz, and its corrosion current density was 4.74×10-7 A·cm-2. The corrosion potential of bare Q235 low carbon steel plate after 0.5 hours immersion was -0.78 V (vs. SCE) on the 0.1 Hz, and its corrosion current density was 4.75×10-6 A·cm-2. The impedance value on 0.1 Hz (|Z|0.1Hz) (1.27×106 Ω·cm2) of sol-gel film coating sample was more than three orders of magnitude higher than the value of the low carbon steel plate. Even dipping in 3.5 wt. % NaCl for 72 hours, the |Z|0.1Hz value of sol-gel coating sample was still one order of magnitude higher than the low carbon steel plate with 0.5 hours immersion. Sol-gel film with excellent adhesion can significantly improve the corrosion resistance of low carbon steel plate. Sol-gel film can increase the protection efficiency of low carbon steel plate by 90%.

Preparation and Photocathodic Protection Properties of NiP/TiO2 Bilayer Coating on Low Carbon Steel

2011 ◽  
Vol 239-242 ◽  
pp. 334-337
Author(s):  
Min Jie Zhou ◽  
Na Zhang
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Electroless Plating ◽  
Electrochemical Method ◽  
Sol Gel ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Corrosion Resistance Property ◽  
Photocathodic Protection ◽  
Bilayer Coatings

The NiP/TiO2 bilayer coatings were prepared on low carbon steel substates using a combined electroless plating and sol-gel method. The performance of photocathodic protection of the bilayer coatings was investigated by the electrochemical method. The results show that the coating with four TiO2 layers and calcined at 400°C exhibits the highest photoelectrochemical efficiency and the best corrosion resistance property.

scholarly journals Sol-Gel Nir-Reflective Multilayer Coatings On Glass Through Uvpolymerizable Ceramic Nanoparticles

1999 ◽  
Vol 576 ◽  
Author(s):  
M. Mennig ◽  
P. W. Oliveira ◽  
H. Schmidt
Keyword(s):  
Sol Gel ◽  
Uv Curing ◽  
Dip Coating ◽  
Float Glass ◽  
Multilayer Coatings ◽  
Practical Application ◽  
Fixed Angle ◽  
Visible Transmittance ◽  
Preparation Route ◽  
Excellent Stability

ABSTRACTA new preparation route for an dielectric NIR-reflexion filter on glass is described. Coating sols are synthesized from SiO2 and TiO2 nanoparticles with photopolymerizable surface ligands. A 5-layer stack consisting of 2 SiO2 and 3 TiO2 layers was deposited on float glass by angledependent dip-coating (ADDC) with a fixed angle of 4° to the vertical and subsequent UV-curing. Finally, the whole stack was densified at 450 °C without cracking or discolouring. UV-vis-NIR transmittance and reflectance spectra show a steep increase of reflectance at 750 nm. In the range between 800 nm and 1200 nm, the reflectance is > 80 %. The visible transmittance is about 72 % due to single reflexion peaks. The bandwidth of the NIR reflection filter prepared by ADDC is about 200 nm larger and its maximum reflectance is only 5 % smaller compared to vertical dip-coating. The interference layer stack shows excellent stability in Taber Abraser, rubber, saline and UV tests, indicating a high potential for practical application.

Thin film coatings of (Ca0.6, Mg0.4)Zr4(PO4)6 on Si3N4 and SiC

1994 ◽  
Vol 9 (8) ◽  
pp. 2014-2028 ◽  
Author(s):  
T.K. Li ◽  
D.A. Hirschfeld ◽  
J.J. Brown
Keyword(s):  
Thin Film ◽  
Corrosion Resistance ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Sol Gel ◽  
Dip Coating ◽  
Ceramic Filters ◽  
Film Coatings ◽  
Thin Film Coatings ◽  
Shock Resistance

Thin film coatings of (Ca0.6, Mg0.4)Zr4(PO4)6 (CMZP) on Si3N4, and SiC substrates, including porous SiC used in ceramic filters, were investigated using sol-gel and dip coating techniques. The coating thickness, ranging from 1 to 5 μm, was found to vary with the selected precursors and their concentrations in the solution. When applied to Si3N4 and SiC, CMZP coatings exhibit good thermal shock resistance and greatly improved alkali corrosion resistance. For porous silicon carbide, homogeneous, crack-free coatings were formed on both the outer surface and the interior sections of the pore walls. The CMZP coatings on Si3N4 and SiC exhibit good thermal shock resistance. The CMZP coating greatly improved the alkali corrosion resistance of Si3N4 and SiC.

scholarly journals Novel green manufacture of metallic aluminum coatings on carbon steel by sol–gel method

RSC Advances ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 6720-6734
Author(s):  
Yuanyuan Chen ◽  
Shaobo Shen ◽  
Quanqi Hou ◽  
Zhen Zhang ◽  
Jinlang Gu
Keyword(s):  
Carbon Steel ◽  
Sol Gel ◽  
The Novel ◽  
Metallic Aluminum ◽  
Air Oxidation ◽  
Aluminum Coatings ◽  
Seawater Corrosion ◽  
Green Manufacture ◽  
Al Coating ◽  
Simulated Seawater

The novel double-layer specimen of Al coating had the ability to resist simulated seawater corrosion for 30 days and air oxidation at 500 °C for 15 h.

scholarly journals CaO stabilized ZrO2 coating intended to reduce corrosion on steel and aluminum substrates

2017 ◽  
Vol 30 (2) ◽  
pp. 14-20
Author(s):  
Iván Villarreal ◽  
Miguel Aldás ◽  
Victor Hugo Guerrero-Barragan ◽  
Nelly María Rosas-Laverde ◽  
Alexis Debut
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Spin Coating ◽  
Sol Gel ◽  
Zirconium Oxychloride ◽  
Dip Coating ◽  
304 Stainless Steel ◽  
Molar Ratio ◽  
Coating Method ◽  
Aluminum Substrates

In this work, we studied the anticorrosive properties of sol-gel nanostructured calcium stabilized zirconia coatings, deposited onto 304 stainless steel and commercial aluminum substrates by dip-coating and spin-coating. During the ceramic oxide synthesis, zirconium oxychloride octahydrate was used as precursor and calcium acetate monohydrate was used as stabilizer of the cubic zirconia structure, in a precursor/stabilizer molar ratio of 0.84/0.16. The gel films deposited on steel and aluminum were heat treated at 550 y 600 °C during 5 and 10 min, respectively, and the adherence of the resulting ceramic films was evaluated. Continuous coatings were obtained that reached average thicknesses between 2 y 3 mm when deposited on stainless steel, and between 1.5 y 1.6 on aluminum, depending on the coating method. The corrosion resistance of the best-adhered coatings was evaluated during 500 h in a saline chamber, according to ASTM B117-11. All the substrate-coating combinations showed a very good corrosion resistance. For the two substrate types, the films deposited by dip-coating showed higher corrosion resistance than the ones deposited by spin-coating. The anticorrosive protective effect of the coatings was better for the aluminum substrates, compared to the stainless-steel substrates.

Study of the Corrosion of Carbon Steel (SAE 1020) Coated with Niobium Oxides

2020 ◽  
Vol 1012 ◽  
pp. 385-389
Author(s):  
P. Detlinger ◽  
R. Helleis ◽  
A.P.C. Matheus ◽  
B. Utri ◽  
B.V. Dias ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Pechini Method ◽  
Low Cost ◽  
Dip Coating ◽  
Open Circuit ◽  
Metallic Surface ◽  
Economic Losses ◽  
X Ray Diffraction ◽  
Metallic Material

Carbon steel is widely used in the industry due to its mechanical properties and low cost, but in contrast it resists poorly to corrosion, leading to economic losses and mechanical issues. The use of surface treatment is essential to extend the life of the metallic material. In this context, niobium is being studied for its great corrosion resistance properties. The aim of this paper was to produce and evaluate the corrosion protection of a niobium-based coating produced by the Pechini Method. The resin was applied in the metallic surface by dip-coating and then calcinated at 450 oC for 1 hour. The coated material was analyzed electrochemically by open circuit potential and potentiodynamic polarization, and morphologically by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. The electrochemical analyses showed that the deposition of the coating increased the corrosion resistance and the morphological analyses indicated a homogenous coating with the presence of phases of NbO and NbO2.

Sign in / Sign up

Export Citation Format

Share Document