Properties of Functional Epoxy Coatings Modified by Carbon Nanoparticles

2015 ◽  
Vol 227 ◽  
pp. 127-130 ◽  
Author(s):  
Linda Diblíková ◽  
Alena Koukalová ◽  
Jan Kudláček ◽  
Michal Zoubek ◽  
František Herrmann
Keyword(s):  
Corrosion Resistance ◽  
Epoxy Resin ◽  
Abrasion Resistance ◽  
Carbon Nanoparticles ◽  
Composite Coatings ◽  
Epoxy Coating ◽  
Functional Coating ◽  
Mwcnt Content ◽  
Pure Epoxy ◽  
The Matrix

Properties of commercially available epoxy coating were modified using multi-walled carbon nanoparticles (MWCNT) to obtain functional coating with improved abrasion resistance. Simultaneously, corrosion resistance of the epoxy resin could not be negatively affected by the particles addition. Composite coatings with various MWCNT content were prepared and evaluated with regard to their function by abrasion and corrosion tests. We found out that the abrasion resistance of the coatings increased with increasing amount of CNT particles in the matrix. Corrosion protection properties of pure epoxy coating as well as its adhesion were slightly improved by adding 0.5 and 1 wt% MWCNT.

COLMONOY 805

Alloy Digest ◽  
1998 ◽  
Vol 47 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Abrasion Resistance ◽  
Coarse Particles ◽  
Powder Metal ◽  
Chromium Boride ◽  
Nickel Chromium ◽  
The Matrix

Abstract Colmonoy 805 is a nickel-chromium-boron alloy with coarse particles of chromium boride added to give it excellent sliding-type abrasion resistance. The alloy contains chromium boride in the matrix as large added particles. It is supplied only as a crushed powder for application with Colmonoy’s Fuseweld process. This datasheet provides information on composition, physical properties, microstructure, and elasticity. It also includes information on corrosion resistance as well as joining and powder metal forms.Filing Code: Ni-233. Producer or source: Wall Colmonoy Corporation. Originally published September 1976, revised December 1998.

scholarly journals Hydraulic Abrasion-Resistant Elastic Epoxy Resin Materials

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Liqun Xu ◽  
Kai Zhang ◽  
Yanhui Liu
Keyword(s):  
Tensile Strength ◽  
Epoxy Resin ◽  
Abrasion Resistance ◽  
Concrete Structures ◽  
Epoxy Coating ◽  
Ring Test ◽  
Future Application ◽  
Pull Out ◽  
Hydraulic Concrete ◽  
Resistance Performance

The abrasion of hydraulic concrete structures caused by the washing action of flowing water is a common problem and cannot be solved by simply increasing the strength of the concrete. To ensure safe operation, increase in service life and reduction of maintenance costs of hydraulic concrete structures and the development of abrasion-resistant materials are required. In this work, polyurethane-modified epoxy resin was synthesized using the interpenetrating network technology (IPN). After many mixing experiments, the ratio of polyether amine to alicyclic amine in Component B was determined to be 29 : 14 and the ratio of Component A to Component B was 7 : 3. With these ratios, elastic epoxy achieved a tensile strength of more than 15 MPa and an elongation rate of more than 20%, thus balancing strength and toughness. The effects of the curing conditions, the ratio of Component A to Component B, and diluents and fillers on tensile strength and elongation of the elastic epoxy resin were analyzed. The results of the analysis indicated that the curing duration should be over 7 days, the optimal proportion of Component A to Component B should be 7 : 3, and the diluent of the elastic epoxy material should be the bifunctional butanedioldiglycidyl ether (622). The reliability of this material was determined by pull-out testing, adhesion, and tensile strength testing. The underwater steel ball test and ring test were adopted as the abrasion-resistance tests for the elastic epoxy resin material. The results showed that the abrasion-resistance performance of elastic epoxy coating improved hundreds of times over that of common concrete. Although the wearing strength was reduced with pressure, the elastic epoxy coating still retained excellent abrasion-resistance performance. At last, future application prospects of elastic epoxy improvement products are introduced and need further reach.

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. 

Comparison of Corrosion Behavior of an Epoxy Coating and a RGO Modified Epoxy Coating on N80 Tubing Steel in 10.0 wt% NaCl Solution at Different Temperatures

2021 ◽  
Vol 1035 ◽  
pp. 554-561
Author(s):  
Li Juan Zhu ◽  
Chun Feng ◽  
Ya Chong Song ◽  
Ya Qiong Cao ◽  
Li Hong Han ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Coefficient Of Thermal Expansion ◽  
Composite Coatings ◽  
Epoxy Coating ◽  
Nacl Solution ◽  
Epoxy Coatings ◽  
Different Temperatures ◽  
Influence Of Temperature On ◽  
Modified Epoxy

Epoxy coatings and Reduced Graphene Oxide (RGO) modified epoxy coatings were prepared on N80 tubing steel. The influence of temperature on the corrosion resistance of RGO modified epoxy coatings was studied. And the corrosion behavior of epoxy coatings and RGO modified epoxy coatings in 10.0 wt% NaCl solution at different temperatures was compared. The results showed that the corrosion resistance of both coatings decreased with the increase of temperature. However, the corrosion resistance of RGO modified epoxy coating was two to three orders of magnitude higher than that of epoxy coating at different test temperature. The addition of RGO nanosheets greatly enhanced the corrosion resistance of epoxy composite coatings in 10.0 wt% NaCl solution at high temperature due to their high impermeability and negative coefficient of thermal expansion.

Properties and Corrosion Behavior of Chromium and Vanadium Carbide Composite Coatings Produced on Ductile Cast Iron by Thermoreactive Diffusion Technique

2020 ◽  
Vol 142 (4) ◽  
Author(s):  
Ali Günen ◽  
Müge Kalkandelen ◽  
İsmail Hakkı Karahan ◽  
Bülent Kurt ◽  
Erdoğan Kanca ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Composite Coatings ◽  
Open Circuit ◽  
Ductile Cast Iron ◽  
Direct Result ◽  
X Ray ◽  
Carbide Coatings ◽  
The Matrix ◽  
Nodular Graphite

Abstract Ductile iron (DI) owes many of its attractive mechanical properties to the graphite nodules in its structure. However, since galvanic coupling can occur between the graphite nodules and the matrix in aggressive environments, these nodules can, at the same time, reduce its corrosion resistance. In this study, composite carbide coatings were grown on the surface of GGG-80 using the thermoreactive diffusion (TRD) process. The process was carried out at 900, 1000, and 1100 °C for 1 h using nanosized Fe-V and Fe-Cr powders. The coatings were characterized by X-ray diffractometry (XRD), two-dimensional profilometry, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and microhardness tests. The corrosion behavior of the coatings were evaluated in three different solutions (3.5 wt% NaCl, 5 wt% H2SO4, and 5 wt% HNO3) using electrochemical open-circuit potential (OCP) and potentiodynamic polarization measurements. Microstructures and hardness tests showed that the nodular graphite in the surface was dissolved at the TRD process temperatures and that a coating of 12–36 µm thickness and 2461–3200 HV0.05 hardness was obtained. The corrosion resistance of the composite coating was up to 10, 33.5, and 75 times higher than the uncoated GGG-80 in NaCl, H2SO4, and HNO3, respectively. The improvement in corrosion resistance was a direct result of the formation of complex carbides and the elimination of graphite nodules in the surface of the alloy.

scholarly journals Starch-jute fiber hybrid biocomposite modified with an epoxy resin coating: fabrication and experimental characterization

2018 ◽  
Vol 27 (5-6) ◽  
Author(s):  
Akarsh Verma ◽  
Kamal Joshi ◽  
Amit Gaur ◽  
V. K. Singh
Keyword(s):  
Tensile Strength ◽  
Epoxy Resin ◽  
Tensile Tests ◽  
Epoxy Coating ◽  
Jute Fiber ◽  
Experimental Characterization ◽  
Compression Moulding ◽  
Major Disadvantage ◽  
The Matrix ◽  
Epoxy Resin Coating

AbstractIn this article, biocomposites derived from a starch-glycerol biodegradable matrix reinforced with jute fibers were fabricated using the wet hand lay-up and compression moulding techniques. Samples having different weight percentages of jute fiber in the starch matrix were analyzed. The fiber’s surface was chemically treated by alkaline sodium hydroxide to improve the interphase bonding between the fiber and the matrix. Tensile tests for the composites were done and the sample with highest tensile strength was selected for further tests that included water absorption (WA), scanning electron microscopy (SEM) and thermal analysis (TA). It has been concluded that the ultimate tensile strength was found to be maximum for the composition of 15% fiber by weight composite as 7.547 MPa without epoxy coating and 10.43 MPa with epoxy coating. The major disadvantage of the biocomposite is its high WA property, which in this study was inhibited by the epoxy resin layer. Herein, the results of various tests done disclose a noteworthy improvement in the overall properties of bio-composite, in comparison to the neat biodegradable starch matrix.

scholarly journals Graphene Reinforced Composites as Protective Coatings for Oil and Gas Pipelines

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1005 ◽  
Author(s):  
Xingyu Wang ◽  
Xiaoning Qi ◽  
Zhibin Lin ◽  
Dante Battocchi
Keyword(s):  
Electron Microscopy ◽  
Surface Roughness ◽  
Corrosion Resistance ◽  
Abrasion Resistance ◽  
Oil And Gas ◽  
Protective Coatings ◽  
Composite Coatings ◽  
Gas Pipelines ◽  
Nanoparticle Agglomeration ◽  
Oil And Gas Pipelines

Corrosion and corrosion-induced damage have resulted mostly in malfunctions and sometimes even in failures of metallic structures, including oil and gas pipelines. In this study, new high-performance composite coatings were developed by incorporating nanoparticles in the polymer resins with applications to oil and gas pipelines. The graphene nanoplatelets under different concentrations were used to prepare the epoxy-based nanocomposites and were then evaluated through mechanical and electrical tests. The integration of high-speed disk and ultrasonication were adopted as the dispersion technique to overcome nanoparticle agglomeration. Electron microscopy techniques were used to investigate the agglomeration. The new composites were qualitatively and quantitatively evaluated in terms of contact angle, surface roughness, adhesion to the substrate, corrosion resistance, and abrasion resistance. The results suggested that the composite with 0.5~1.0 wt.% of the graphene nanofillers led to the largest improvement in both mechanical and electrochemical properties. Distribution of nanoparticles in the matrix was observed using scanning electron microscopy and surface roughness using atomic force microscopy. Large agglomeration that was observed at the higher concentrations mainly resulted in the reduction of corrosion resistance and abrasion resistance.

Modification of Epoxy Resin by Reactive Block Copolymer SEBSMB

2014 ◽  
Vol 496-500 ◽  
pp. 71-74 ◽  
Author(s):  
Jian Ping Zhou ◽  
Hui Ru Wu ◽  
Wan Li Fu ◽  
Shi Jun Jia
Keyword(s):  
Thermal Stability ◽  
Block Copolymer ◽  
Impact Strength ◽  
Epoxy Resin ◽  
Hypothetical Model ◽  
Pure Epoxy ◽  
Self Assembling ◽  
The Matrix ◽  
The Impact ◽  
Modified Resin

Reactive block copolymer SEBSMB was used as modifier to toughen epoxy resin. The results indicate that ideal enhancement of toughness could be achieved by this method. The impact strength increases with increase of the content of SEBSMB in the matrix and it could be enhanced by 200% at 20wt% addition of the modifier. DMA and TG results show that the modified resin exhibits similar thermal stability as compared with pure epoxy resin. The toughening effect may be ascribed to the unique self-assembling structure of SEBSMB in the matrix and a hypothetical model was proposed.

Corrosion Resistance of Plasma Sprayed AT13 Composite Ceramic Coating on Mg

2013 ◽  
Vol 575-576 ◽  
pp. 142-146
Author(s):  
Er Lin Lu ◽  
Yan Chen ◽  
Sheng Lu
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Epoxy Resin ◽  
Ceramic Coating ◽  
Composite Coatings ◽  
Composite Ceramic ◽  
Ceramic Coatings ◽  
Corrosion Property ◽  
Electrochemical Tests ◽  
Plasma Sprayed

NiCoCrAlY/AT13 composite coating was prepared by plasma spraying technology on AZ91D substrate and sealed with three different methods. The corrosion resistances of the composite ceramic coatings with and without sealing were evaluated by immersion and electrochemical tests The results show that NiCoCrAlY/AT13 composite ceramic coating represents better corrosion property than single AT13 ceramic coating. The corrosion resistances of NiCoCrAlY/AT13 composite coatings with sealing are superior to that of unsealing coating. Among three sealed coatings, both coatings sealed with paraffin and varnish exhibit better corrosion resistance with corrosion rate of 0.130 g/(m2·h), 0.204 g/(m2·h), and Icorrof 1.754E-7 (A·cm-2), 9.493E-8 (A·cm-2) respectively, while the coating with epoxy resin sealing is relatively the worst one with corrosion rate of 0.744 g/(m2·h) and Icorrof 1.650E-7 (A·cm-2).

scholarly journals High Performance Anti-Corrosion Coatings of Poly (Vinyl Butyral) Composites with Poly N-(vinyl)pyrrole and Carbon Black Nanoparticles

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2307 ◽  
Author(s):  
Lu Hao ◽  
Guowei Lv ◽  
Yaqian Zhou ◽  
Kaiming Zhu ◽  
Mochen Dong ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Carbon Black ◽  
High Performance ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Corrosion Property ◽  
Corrosion Properties ◽  
The Matrix ◽  
Superior Corrosion Resistance ◽  
Vinyl Butyral

Zinc is widely used in battery negative electrodes and steel coatings for automotive industries. The anti-corrosion property of zinc is the most important factor determining the performance and lifetime of the products. In this paper, both size-controlled poly N-(vinyl)pyrrole (PNVPY) nanoparticles and carbon black (CB) nanoparticles were compounded with poly (vinyl butyral) (PVB) binder developing a series of composite coatings covered on the zinc substrates using a spin-coating technique. The morphologies of the surface and cross section of the PNVPY/CB/PVB coatings indicate that the PNVPY and CB nanoparticles are uniformly distributed in the matrix. The corrosion resistance of the composite coatings was tested by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization in a 3.5% NaCl solution. It is found that the coating with 1.9 wt.% PNVPY and 2.3 wt.% CB nanoparticles shows a remarkably high resistance value (Rc) and corrosion protection efficiency (99.99%). Meanwhile, the immersion results also reveal its superior corrosion resistance. It is considered that the nanoscale dispersion of PNVPY and carbon in PVB matrix and the strong interface action between the nanoparticles and PVB result in the uniform microstructure of the composites which endues the superior corrosion properties of the coatings.

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