New architectured hybrid sol-gel coatings for wear and corrosion protection of low-carbon steel

Chromium pre-treatments of metal have been replaced by silane pre-treatments as more environmental friendly option.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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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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Synthesis of poly(aniline-co-o-toluidine) coatings and their corrosion-protection performance on low-carbon steel

Journal of Applied Polymer Science ◽

10.1002/app.25346 ◽

2006 ◽

Vol 103 (3) ◽

pp. 1868-1878 ◽

Cited By ~ 21

Author(s):

Pritee Pawar ◽

S. R. Sainkar ◽

P. P. Patil

Keyword(s):

Carbon Steel ◽

Corrosion Protection ◽

Low Carbon Steel ◽

Low Carbon ◽

Poly Aniline

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Conducting polyaniline/nano-zinc phosphate composite as a pigment for corrosion protection of low-carbon steel

Chemical Papers ◽

10.1007/s11696-016-0082-7 ◽

2016 ◽

Vol 71 (2) ◽

pp. 189-197 ◽

Cited By ~ 5

Author(s):

Pravin P. Deshpande ◽

Abhijit A. Bhopale ◽

Vandana A. Mooss ◽

Anjali A. Athawale

Keyword(s):

Carbon Steel ◽

Corrosion Protection ◽

Zinc Phosphate ◽

Low Carbon Steel ◽

Low Carbon ◽

Conducting Polyaniline ◽

Nano Zinc

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Corrosion protection of low-carbon steel using exopolysaccharide coatings from Leuconostoc mesenteroides

Biotechnology Letters ◽

10.1007/s10529-011-0539-2 ◽

2011 ◽

Vol 33 (6) ◽

pp. 1093-1100 ◽

Cited By ~ 36

Author(s):

Victoria L. Finkenstadt ◽

Gregory L. Côté ◽

J. L. Willett

Keyword(s):

Carbon Steel ◽

Corrosion Protection ◽

Leuconostoc Mesenteroides ◽

Low Carbon Steel ◽

Low Carbon

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Preparation of Ultra-Fine MgO•Al2O3 Spinel Powder and its Metallurgy Behavior in Low Carbon Steel

Materials Science Forum ◽

10.4028/www.scientific.net/msf.675-677.291 ◽

2011 ◽

Vol 675-677 ◽

pp. 291-294 ◽

Cited By ~ 1

Author(s):

Yang Li ◽

Shuang Jiang Li ◽

Ying Zhuang ◽

Wei Jian Li ◽

Zhou Hua Jiang

Keyword(s):

Carbon Steel ◽

Solid Phase ◽

Spinel Phase ◽

Sol Gel ◽

Low Carbon Steel ◽

Fine Powder ◽

Powder Size ◽

Low Carbon ◽

Average Size ◽

Spinel Powder

Micron, sub-micron and nanometer sized MgO•Al2O3 ultra-fine powders were prepared by gel precipitation, solid-phase synthesis, sol-gel and flame throwing pyrogenation methods. XRD analysis showed that all of the ultra-fine powder is pure with the single MgO•Al2O3 spinel phase. The powder size was measured by laser granularity analyzer and the average size is 1780, 505 and 60 nm with a quite uniform distribution of particle size. MgO•Al2O3 spinel powder with different granularity were sprayed into molten low carbon steel in MgO crucible and MoSi2 furnace at 1873 K. Quantitative microscopic examination showed that big particle inclusions reduce and small particle inclusions increase, as a result, the average size reduce. Data comparison from spraying powders with different size showed that spraying MgO•Al2O3 of nanometer tends to cause more small inclusions in molten steel. The sprayed steel samples were rolled and heat treated for the mechanical properties tests, which showed spraying nanometer MgO•Al2O3 is the best way to improve mechanical property of steel.

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Conducting polyaniline/multi-wall carbon nanotubes composite paints on low carbon steel for corrosion protection: electrochemical investigations

Chemical Papers ◽

10.2478/s11696-012-0273-9 ◽

2013 ◽

Vol 67 (8) ◽

Cited By ~ 18

Author(s):

Pravin Deshpande ◽

Sanket Vathare ◽

Shashikant Vagge ◽

Elena Tomšík ◽

Jaroslav Stejskal

Keyword(s):

Carbon Nanotubes ◽

Carbon Steel ◽

Corrosion Protection ◽

Open Circuit Potential ◽

Electrochemical Impedance ◽

Low Carbon Steel ◽

Open Circuit ◽

Low Carbon ◽

Multi Wall Carbon Nanotubes ◽

Poly Aniline

AbstractThe coaxial coating of multi-wall carbon nanotubes (MWCNT) with poly(aniline) (PANI) was synthesised and a paint was prepared containing conducting PANI-MWCNT composite. The corrosion protection performance was assessed by open circuit potential measurements, potentiodynamic polarisation, and electrochemical impedance spectroscopy. The corrosion rate of low-carbon steel coated with 1.5 mass % of PANI-MWCNT-based paint in 3.5 mass % sodium chloride solution was found to be 0.037 mm y−1, about 5.2 times lower than that of unpainted low-carbon steel and 3.6 times lower than that of epoxy painted steel.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.334 ◽

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.

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