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

Little attention has been paid to the nano-TiO2as corrosion inhibitor before. In this paper, Myristic acid-modified nano-TiO2(MA-TiO2) were synthesized by Myristic acid and tetrabutyl titanate via the sol-gel method, and it was characterized by IR and TEM. MA-TiO2was dispersed in oil, and used as a corrosion inhibitor. From the Tafel plots and EIS spectra, we can know that the values of the current densities decreased by the addition of MA-TiO2. Because of the MA-TiO2formed a deposition layer in the surface of 45#carbon steel panels, the current density of the the base oil with MA-TiO2is much smaller than the base oil. The inhibition efficiency was over 90% with added 5 wt % TiO2.

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Effect of Nanoparticles on Wettability of Nanocoating on Carbon Steel

International Journal of Engineering Materials and Manufacture ◽

10.26776/ijemm.01.02.2016.05 ◽

2016 ◽

Vol 1 (2) ◽

pp. 71-74

Author(s):

Norhasnidawani Johari ◽

Noor Azlina Hassan ◽

Norita Hassan ◽

Mohd Hanafi Ani

Keyword(s):

Contact Angle ◽

Carbon Steel ◽

Metal Oxide ◽

Water Drop ◽

Metal Oxide Nanoparticles ◽

Sol Gel ◽

Hydrophobic Surface ◽

Oxide Nanoparticles ◽

Water Medium ◽

Wetting Ability

Nanocoatings plays an important role in coating industry. The solution was being prepared through copolymerization of epoxy resin hardener and with the incorporation of metal oxide nanoparticles, Zinc Oxide (ZnO) and Silica (SiO2). ZnO and SiO2 were synthesized using sol-gel. Epoxy hardener acted as host while the metal oxide nanoparticles as guest components. The formulation of nanocoatings with excellent adhesion strength and corrosion protection of carbon steel was studied. The performance of wetting ability with different medium was analysed using contact angle. Water medium showed the addition of 3wt% of hybrid between ZnO and SiO2 was the best nanocoating to form hydrophobic surface and was also the best nanocoating surface to form hydrophilic surface with vacuum oil dropping. In oil dropping, the contact angle was smaller than 90° and the water drop tends to spreads on surface.

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Combined and individual doxorubicin/vancomycin drug loading, release kinetics and apatite formation for the CaO–CuO–P2O5–SiO2–B2O3 mesoporous glasses

RSC Advances ◽

10.1039/c6ra06829d ◽

2016 ◽

Vol 6 (56) ◽

pp. 51046-51056 ◽

Cited By ~ 20

Author(s):

Gurbinder Kaur ◽

O. P. Pandey ◽

K. Singh ◽

Bhupendra Chudasama ◽

V. Kumar

Keyword(s):

Release Kinetics ◽

Drug Loading ◽

Sol Gel ◽

Apatite Formation ◽

The Novel ◽

Gel Technique ◽

Glass Series

The novel mesoporous glass series based on (25 − x)CaO–xCuO–10P2O5–5B2O3–60SiO2 (x = 2.5, 5, 7.5, 10) has been prepared using the sol–gel technique.

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Catalysts for Wet Air Oxidation Based on Ce-Zr-Pr-O Mixed Oxides Prepared by Soft Chemistry

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.45.2089 ◽

2006 ◽

Vol 45 ◽

pp. 2089-2095

Author(s):

Jana Mikulová ◽

Sylvie Rossignol ◽

Jacques Barbier Jr. ◽

Charles Kappenstein ◽

Daniel Duprez

Keyword(s):

Aqueous Solution ◽

Mixed Oxides ◽

Platinum Catalyst ◽

Sol Gel ◽

Ruthenium Catalysts ◽

Catalytic Wet Air Oxidation ◽

Air Oxidation ◽

Wet Air Oxidation ◽

Soft Chemistry ◽

Pure Ceria

Sol-gel Zr0.1Ce0.9O2 and Zr0.1(Ce0.75Pr0.25)O2 mixed oxides and coprecipitated pure ceria CeO2 displaying the fluorine type structure have been used as platinum or ruthenium catalysts’ supports for catalytic wet air oxidation (CWAO) of aqueous solution of acetic acid (78 mmol.L-1). These catalysts were prepared by conventional impregnation (5 wt-%) from platinum and ruthenium precursor salts or by exchange (~2 wt-%) in the case of ruthenium. A screening of catalysts in CWAO at 200°C under 2 MPa was performed and reveals that the best platinum catalyst is supported on pure ceria displaying large surface. For ruthenium catalysts, the highest conversion after 3 hours of reaction has been reached by the Ru/Zr-Ce-O system.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.686.244 ◽

2013 ◽

Vol 686 ◽

pp. 244-249 ◽

Cited By ~ 10

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.

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Preparation of Sol-Gel Derived Anticorrosive Coating on Q235 Carbon Steel Substrate with Long-Term Corrosion Prevention Durability

Materials ◽

10.3390/ma12121960 ◽

2019 ◽

Vol 12 (12) ◽

pp. 1960 ◽

Cited By ~ 2

Author(s):

Yue Li ◽

Chunchun Wu ◽

Ming Xue ◽

Jiawen Cai ◽

Yi Huang ◽

...

Keyword(s):

Carbon Steel ◽

Coating Thickness ◽

Steel Substrate ◽

Salt Spray ◽

Sol Gel ◽

Coating System ◽

Barrier Effect ◽

Corrosion Prevention ◽

Q235 Carbon Steel ◽

Layer Coating

Anticorrosive coatings prepared by sol-gel derived approaches have become an emergent research area in the field of corrosion prevention materials. Furthermore, enhanced coating thickness can greatly improve the barrier effect of the sol-gel coatings, thus influencing their service life in industrial applications. Here, we propose the preparation of a two-layer coating system using a low-cost sol-gel derived method. The coating structure was composed of first an underlying layer incorporated with silica and titania powder as filler and pigment materials, and a second translucent topcoat containing a colloidal silica sol-gel matrix crosslinked by methyltrimethoxysilane (MTMS). This coating system was applied on Q235 carbon steel substrate by a two-step spray deposition method, resulting in an enhanced coating thickness of around 35 μm. The physical and morphological properties of the coatings were characterized using multiple techniques, including scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and atomic force microscopy (AFM). The anticorrosion performance of the sol-gel coatings was studied by a salt spray test, outdoor exposure test and electrochemical impedance spectroscopy (EIS). Results revealed that this two-layer coating system exhibited excellent physical and anticorrosion properties, and that the topcoat played a crucial role in maintaining the barrier effect and preventing water leakage.

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

Materials Science Forum ◽

10.4028/www.scientific.net/msf.984.43 ◽

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%.

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