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M Mahdavian - One of the best experts on this subject based on the ideXlab platform.
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Fabrication of Highly Effective Polyaniline Grafted Carbon Nanotubes To Induce Active Protective Functioning in a Silane Coating
Industrial & Engineering Chemistry Research, 2019Co-Authors: Sajjad Akbarzadeh, M Mahdavian, Bahram Ramezanzadeh, Mohammad Ramezanzadeh, Reza NaderiAbstract:Neat Silane Coatings only provide barrier protection for the substrate subjected to corrosive media; therefore, the inclusion of efficient corrosion inhibitor in Silane Coating is vital to achieving active protection at defect sites of Coatings. Elucidating the role of polyaniline (PANI) as a modifier for functionalized carbon nanotubes (CNTs) in the Silane matrix to achieve active protection is the aim of this study. Different methods such as Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Raman spectroscopy, zeta potential (ZP), and field emission scanning electron microscopy (FESEM) were employed to examine the structure of functionalized CNTs. FESEM images showed an increase in the diameter of nanotubes after modification proving the good grafting of PANI on the CNTs’ surface, which was also confirmed by Raman, FTIR, and XRD measurements. Electrochemical impedance spectroscopy (EIS) was conducted on intact and scratched Coatings. Results revea...
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Fabrication of protective Silane Coating on mild steel: The role of hydrogen peroxide in acid treatment solution
Journal of Industrial and Engineering Chemistry, 2018Co-Authors: S.m. Orouji, Reza Naderi, M MahdavianAbstract:Abstract This work aims to study the effect of H2O2 in acid treatment solution on the protective properties of Silane Coating on mild steel. To this end, different concentrations of H2O2 up to 250 ppm were added to the sulfuric acid solution. The surface morphology, surface roughness, wettability and corrosion behavior of mild steel in the acid treatment solution were studied by SEM, GIXRD, AFM, contact angle, OCP and EIS. Then, a Silane Coating was applied onto the acid treated samples. It was found that H2O2 at optimal concentration (150 ppm) can improve corrosion protective properties of the Silane Coating.
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Fabrication of Silane Coating with improved protection performance using Mentha longifolia extract
Journal of the Taiwan Institute of Chemical Engineers, 2018Co-Authors: S. Nikpour, Reza Naderi, M MahdavianAbstract:Abstract This work reports incorporation of Mentha longifolia in a Silane Coating to improve active corrosion protection. Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) were employed to characterize the chemical structure of extract. Electrochemical impedance spectroscopy (EIS) revealed that superlative corrosion resistance of Silane primer was achieved at 200 ppm inhibitor concentration. DC polarization and open circuit potential (OCP) measurements confirmed the EIS results. The effect of inhibitor concentration on the crosslinking density was evaluated by FTIR and its subsequent effect on the Coating wettability was assessed by water droplet contact angle method. The protective performance of the artificially defected bilayer Coating system (Silane + epoxy) assessed by EIS and surface analysis showed an improvement in the anticorrosion properties of Silane formulated with 200 ppm extract due to the corrosion reaction restriction. Solution phase studies by electrochemical test and SEM indicated participation of a protective layer on the surface.
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Evaluation of the corrosion protection performance of mild steel coated with hybrid sol-gel Silane Coating in 3.5 wt.% NaCl solution
Progress in Organic Coatings, 2018Co-Authors: E Alibakhshi, Bahram Ramezanzadeh, M. Akbarian, Mohammad Ramezanzadeh, M MahdavianAbstract:Abstract This study aims at studying the effect of Silane hydrolysis time and concentration on the corrosion protection performance of an eco-friendly hybrid Silane Coating based on tetraethylorthosilicate (TEOS) and trimethoxymethylSilane (TMOMS) on mild steel substrate. By electrochemical impedance spectroscopy (EIS) and salt spray test the corrosion evaluations were done. Results of Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA) and water contact angle tests measurements revealed the effective impact of the hydrolysis time and Silane concentration on the curing process of the Coating. Results revealed that the mixture of 50% Silanes (TEOS/ TMOMS: 50/50 w/w) hydrolyzed for 24 h resulted in the highest corrosion resistance. The enhancement in protective performance of the hybrid Coating was connected to the better condensation reaction, denser Si–O–Si network formation and less hydrophilicity of the Coating.
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a comparative study on corrosion inhibitive effect of nitrate and phosphate intercalated zn al layered double hydroxides ldhs nanocontainers incorporated into a hybrid Silane layer and their effect on cathodic delamination of epoxy topcoat
Corrosion Science, 2017Co-Authors: E Alibakhshi, E Ghasemi, M Mahdavian, Bahram RamezanzadehAbstract:Abstract This study aims at synthesis and characterization of Zn-Al-PO 4 3− and Zn-Al-NO 3 − layered double hydroxides (LDHs) through employing FE-SEM, EDS and X-ray photoelectron spectroscopy (XPS) analyses. The smart release ability of the inhibitive spices from LDHs were checked by EIS, polarization and surface analysis tests in 3.5 wt.% NaCl solution. A two-layer Coating system consisting of Silane primer filled with LDHs and epoxy-polyamide top coat were applied on steel and then the active inhibition capability of the Coatings was investigated. The addition of Zn-Al-PO 4 3− LDH to the Silane Coating provides efficient inhibition behavior by releasing PO 4 3− anions through ion exchange process.
M Mahdavian - One of the best experts on this subject based on the ideXlab platform.
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assessment of the smart self healing corrosion protection properties of a water base hybrid organo Silane film combined with non toxic organic inorganic environmentally friendly corrosion inhibitors on mild steel
Journal of Cleaner Production, 2019Co-Authors: Reza Samiee, M Mahdavian, Bahram Ramezanzadeh, E AlibakhshiAbstract:Abstract Combining Silane formulation with appropriate non-toxic chrome-free corrosion inhibitors provides high performance Coatings with superior anti-corrosion properties. The aim of this work is development of an environmentally friendly sol-gel based Silane Coating with smart self-healing corrosion resistance properties utilizing the mixture of organic-benzimidazole/inorganic-praseodymium inhibitors. Results of electrochemical impedance spectroscopy (EIS), electrochemical noise (EN), scanning vibrating electrode technique (SVET), potentiodynamic polarization, and salt spray tests declared the effective self-healing characteristics of the Coating incorporated with the mixture of inhibitors. The healing capability of the modified Coatings was demonstrated by SVET. The current distribution results indicated that both anodic and cathodic inhibition occur at the scratched area with a dominant effect on the cathodic zones.
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evaluation of the corrosion protection performance of mild steel coated with hybrid sol gel Silane Coating in 3 5 wt nacl solution
Progress in Organic Coatings, 2018Co-Authors: E Alibakhshi, Bahram Ramezanzadeh, M. Akbarian, Mohammad Ramezanzadeh, M MahdavianAbstract:Abstract This study aims at studying the effect of Silane hydrolysis time and concentration on the corrosion protection performance of an eco-friendly hybrid Silane Coating based on tetraethylorthosilicate (TEOS) and trimethoxymethylSilane (TMOMS) on mild steel substrate. By electrochemical impedance spectroscopy (EIS) and salt spray test the corrosion evaluations were done. Results of Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA) and water contact angle tests measurements revealed the effective impact of the hydrolysis time and Silane concentration on the curing process of the Coating. Results revealed that the mixture of 50% Silanes (TEOS/ TMOMS: 50/50 w/w) hydrolyzed for 24 h resulted in the highest corrosion resistance. The enhancement in protective performance of the hybrid Coating was connected to the better condensation reaction, denser Si–O–Si network formation and less hydrophilicity of the Coating.
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steel surface treatment with three different acid solutions and its effect on the protective properties of the subsequent Silane Coating
Progress in Organic Coatings, 2017Co-Authors: Seyed Siamak Rouzmeh, R Naderi, M MahdavianAbstract:Abstract Surface treatment of steel before application of Silane Coating plays important role to provide better corrosion protection. This work aims to evaluate the effect of steel surface treatment with acid solutions on the protective properties of subsequent organoSilane Coating. For this purpose, sulfuric, phosphoric and hydrochloric acid solutions were prepared at pH 3. The change in surface chemistry and morphology of mild steel surface after acid treatment was assessed by FE-SEM, XPS and water contact angle measurements. After surface treatment with acid solutions, a Silane Coating was applied on the steel samples. EIS measurements on the Silane coated samples showed that the one treated by sulfuric acid solution provided better protection compared to the rest of samples.
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the effect of zinc cation on the anticorrosion behavior of an eco friendly Silane sol gel Coating applied on mild steel
Progress in Organic Coatings, 2016Co-Authors: Shima Alinejad, R Naderi, M MahdavianAbstract:To provide active protection of mild steel, an eco-friendly Silane sol-gel Coating with ZnCl2 as zinc cation source was used. The optimal concentration of zinc cation was found using electrochemical impedance spectroscopy (EIS) and surface analysis. Evaluation of EIS data indicated that the superiority of doped-Silane is mainly attributed to the corrosion inhibitive function of zinc cation at interface. Zinc cation showed no effect on the thickness and hydrophobicity of Coatings which were evaluated by FESEM and water contact angle, indicating no influence on condensation reactions. Using electrochemical techniques and surface analysis, an insight into the zinc cation inhibition mechanism was obtained in the absence of Silane Coating. In the presence of zinc cation, FESEM/EDS indicated precipitation of a layer composed of zinc hydroxide and/or oxide on the mild steel surface.
Bahram Ramezanzadeh - One of the best experts on this subject based on the ideXlab platform.
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Fabrication of Highly Effective Polyaniline Grafted Carbon Nanotubes To Induce Active Protective Functioning in a Silane Coating
Industrial & Engineering Chemistry Research, 2019Co-Authors: Sajjad Akbarzadeh, M Mahdavian, Bahram Ramezanzadeh, Mohammad Ramezanzadeh, Reza NaderiAbstract:Neat Silane Coatings only provide barrier protection for the substrate subjected to corrosive media; therefore, the inclusion of efficient corrosion inhibitor in Silane Coating is vital to achieving active protection at defect sites of Coatings. Elucidating the role of polyaniline (PANI) as a modifier for functionalized carbon nanotubes (CNTs) in the Silane matrix to achieve active protection is the aim of this study. Different methods such as Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Raman spectroscopy, zeta potential (ZP), and field emission scanning electron microscopy (FESEM) were employed to examine the structure of functionalized CNTs. FESEM images showed an increase in the diameter of nanotubes after modification proving the good grafting of PANI on the CNTs’ surface, which was also confirmed by Raman, FTIR, and XRD measurements. Electrochemical impedance spectroscopy (EIS) was conducted on intact and scratched Coatings. Results revea...
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assessment of the smart self healing corrosion protection properties of a water base hybrid organo Silane film combined with non toxic organic inorganic environmentally friendly corrosion inhibitors on mild steel
Journal of Cleaner Production, 2019Co-Authors: Reza Samiee, M Mahdavian, Bahram Ramezanzadeh, E AlibakhshiAbstract:Abstract Combining Silane formulation with appropriate non-toxic chrome-free corrosion inhibitors provides high performance Coatings with superior anti-corrosion properties. The aim of this work is development of an environmentally friendly sol-gel based Silane Coating with smart self-healing corrosion resistance properties utilizing the mixture of organic-benzimidazole/inorganic-praseodymium inhibitors. Results of electrochemical impedance spectroscopy (EIS), electrochemical noise (EN), scanning vibrating electrode technique (SVET), potentiodynamic polarization, and salt spray tests declared the effective self-healing characteristics of the Coating incorporated with the mixture of inhibitors. The healing capability of the modified Coatings was demonstrated by SVET. The current distribution results indicated that both anodic and cathodic inhibition occur at the scratched area with a dominant effect on the cathodic zones.
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evaluation of the corrosion protection performance of mild steel coated with hybrid sol gel Silane Coating in 3 5 wt nacl solution
Progress in Organic Coatings, 2018Co-Authors: E Alibakhshi, Bahram Ramezanzadeh, M. Akbarian, Mohammad Ramezanzadeh, M MahdavianAbstract:Abstract This study aims at studying the effect of Silane hydrolysis time and concentration on the corrosion protection performance of an eco-friendly hybrid Silane Coating based on tetraethylorthosilicate (TEOS) and trimethoxymethylSilane (TMOMS) on mild steel substrate. By electrochemical impedance spectroscopy (EIS) and salt spray test the corrosion evaluations were done. Results of Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA) and water contact angle tests measurements revealed the effective impact of the hydrolysis time and Silane concentration on the curing process of the Coating. Results revealed that the mixture of 50% Silanes (TEOS/ TMOMS: 50/50 w/w) hydrolyzed for 24 h resulted in the highest corrosion resistance. The enhancement in protective performance of the hybrid Coating was connected to the better condensation reaction, denser Si–O–Si network formation and less hydrophilicity of the Coating.
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corrosion protection and adhesion properties of the epoxy Coating applied on the steel substrate pre treated by a sol gel based Silane Coating filled with amino and isocyanate Silane functionalized graphene oxide nanosheets
Applied Surface Science, 2018Co-Authors: Nafise Parhizkar, Bahram Ramezanzadeh, Taghi ShahrabiAbstract:Abstract This research has focused on the effect of graphene oxide (GO) nano-fillers embedded in the sol-gel based Silane Coating on the corrosion protection and adhesion properties of the epoxy Coating applied on the steel substrate pre-treated by Silane Coatings. For this purpose, a mixture of MethyltriethoxySilane (MTES) and Tetraethylorthosilicate (TEOS) Silane precursors was used for preparation of composite matrix and the GO nanosheets, which are covalently functionalized with 3-(Triethoxysilyl)propyl isocyanate (TEPI, IGO nano-fillers) and 3-aminopropyltriethoxySilane (APTES, AGO nano-fillers), were used as filler. The GO, AGO and IGO nanosheets were characterized by Fourier Transform Infrared Spectroscopy (FT-IR), UV–Visible analysis and field emission-scanning electron microscopy techniques. The performance of the Silane/epoxy Coatings was investigated by pull-off adhesion, cathodic delamination, salt spray and electrochemical impedance spectroscopy (EIS) tests. Results revealed that AGO and IGO nano-fillers significantly improved the corrosion resistance and adhesion properties of the top epoxy Coating due to better compatibility with Silane matrix, excellent barrier properties and the formation of covalent bonds with the top epoxy Coating.
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Evaluation of the corrosion protection performance of mild steel coated with hybrid sol-gel Silane Coating in 3.5 wt.% NaCl solution
Progress in Organic Coatings, 2018Co-Authors: E Alibakhshi, Bahram Ramezanzadeh, M. Akbarian, Mohammad Ramezanzadeh, M MahdavianAbstract:Abstract This study aims at studying the effect of Silane hydrolysis time and concentration on the corrosion protection performance of an eco-friendly hybrid Silane Coating based on tetraethylorthosilicate (TEOS) and trimethoxymethylSilane (TMOMS) on mild steel substrate. By electrochemical impedance spectroscopy (EIS) and salt spray test the corrosion evaluations were done. Results of Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA) and water contact angle tests measurements revealed the effective impact of the hydrolysis time and Silane concentration on the curing process of the Coating. Results revealed that the mixture of 50% Silanes (TEOS/ TMOMS: 50/50 w/w) hydrolyzed for 24 h resulted in the highest corrosion resistance. The enhancement in protective performance of the hybrid Coating was connected to the better condensation reaction, denser Si–O–Si network formation and less hydrophilicity of the Coating.
E Alibakhshi - One of the best experts on this subject based on the ideXlab platform.
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assessment of the smart self healing corrosion protection properties of a water base hybrid organo Silane film combined with non toxic organic inorganic environmentally friendly corrosion inhibitors on mild steel
Journal of Cleaner Production, 2019Co-Authors: Reza Samiee, M Mahdavian, Bahram Ramezanzadeh, E AlibakhshiAbstract:Abstract Combining Silane formulation with appropriate non-toxic chrome-free corrosion inhibitors provides high performance Coatings with superior anti-corrosion properties. The aim of this work is development of an environmentally friendly sol-gel based Silane Coating with smart self-healing corrosion resistance properties utilizing the mixture of organic-benzimidazole/inorganic-praseodymium inhibitors. Results of electrochemical impedance spectroscopy (EIS), electrochemical noise (EN), scanning vibrating electrode technique (SVET), potentiodynamic polarization, and salt spray tests declared the effective self-healing characteristics of the Coating incorporated with the mixture of inhibitors. The healing capability of the modified Coatings was demonstrated by SVET. The current distribution results indicated that both anodic and cathodic inhibition occur at the scratched area with a dominant effect on the cathodic zones.
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evaluation of the corrosion protection performance of mild steel coated with hybrid sol gel Silane Coating in 3 5 wt nacl solution
Progress in Organic Coatings, 2018Co-Authors: E Alibakhshi, Bahram Ramezanzadeh, M. Akbarian, Mohammad Ramezanzadeh, M MahdavianAbstract:Abstract This study aims at studying the effect of Silane hydrolysis time and concentration on the corrosion protection performance of an eco-friendly hybrid Silane Coating based on tetraethylorthosilicate (TEOS) and trimethoxymethylSilane (TMOMS) on mild steel substrate. By electrochemical impedance spectroscopy (EIS) and salt spray test the corrosion evaluations were done. Results of Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA) and water contact angle tests measurements revealed the effective impact of the hydrolysis time and Silane concentration on the curing process of the Coating. Results revealed that the mixture of 50% Silanes (TEOS/ TMOMS: 50/50 w/w) hydrolyzed for 24 h resulted in the highest corrosion resistance. The enhancement in protective performance of the hybrid Coating was connected to the better condensation reaction, denser Si–O–Si network formation and less hydrophilicity of the Coating.
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Evaluation of the corrosion protection performance of mild steel coated with hybrid sol-gel Silane Coating in 3.5 wt.% NaCl solution
Progress in Organic Coatings, 2018Co-Authors: E Alibakhshi, Bahram Ramezanzadeh, M. Akbarian, Mohammad Ramezanzadeh, M MahdavianAbstract:Abstract This study aims at studying the effect of Silane hydrolysis time and concentration on the corrosion protection performance of an eco-friendly hybrid Silane Coating based on tetraethylorthosilicate (TEOS) and trimethoxymethylSilane (TMOMS) on mild steel substrate. By electrochemical impedance spectroscopy (EIS) and salt spray test the corrosion evaluations were done. Results of Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA) and water contact angle tests measurements revealed the effective impact of the hydrolysis time and Silane concentration on the curing process of the Coating. Results revealed that the mixture of 50% Silanes (TEOS/ TMOMS: 50/50 w/w) hydrolyzed for 24 h resulted in the highest corrosion resistance. The enhancement in protective performance of the hybrid Coating was connected to the better condensation reaction, denser Si–O–Si network formation and less hydrophilicity of the Coating.
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a comparative study on corrosion inhibitive effect of nitrate and phosphate intercalated zn al layered double hydroxides ldhs nanocontainers incorporated into a hybrid Silane layer and their effect on cathodic delamination of epoxy topcoat
Corrosion Science, 2017Co-Authors: E Alibakhshi, E Ghasemi, M Mahdavian, Bahram RamezanzadehAbstract:Abstract This study aims at synthesis and characterization of Zn-Al-PO 4 3− and Zn-Al-NO 3 − layered double hydroxides (LDHs) through employing FE-SEM, EDS and X-ray photoelectron spectroscopy (XPS) analyses. The smart release ability of the inhibitive spices from LDHs were checked by EIS, polarization and surface analysis tests in 3.5 wt.% NaCl solution. A two-layer Coating system consisting of Silane primer filled with LDHs and epoxy-polyamide top coat were applied on steel and then the active inhibition capability of the Coatings was investigated. The addition of Zn-Al-PO 4 3− LDH to the Silane Coating provides efficient inhibition behavior by releasing PO 4 3− anions through ion exchange process.
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Enhancement of Silane Coating protective performance by using a polydimethylsiloxane additive
Journal of Industrial and Engineering Chemistry, 2017Co-Authors: M Mahdavian, E Alibakhshi, Bahram Ramezanzadeh, Pooneh Kardar, M. Akbarian, Mohammad Ramezanzadeh, S. FarashiAbstract:Abstract This work intends to study the effect of a polydimethylsiloxane additive on the protection performance of a hybrid Silane Coating on mild steel. Electrochemical impedance spectroscopy, polarization and electrochemical noise measurements and salt spray showed an increase in corrosion resistance of the Silane Coating in the presence of the additive. Silane films were examined by FTIR, water droplet contact angle, Vickers hardness and SEM. Results showed decrease in crosslinking density in the presence of the additive. Superior corrosion protection in the presence of additive was attributed to the enhanced hydrophobic character and flexibility of the Coating.
M G S Ferreira - One of the best experts on this subject based on the ideXlab platform.
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plasma anodized ze41 magnesium alloy sealed with hybrid epoxy Silane Coating
Corrosion Science, 2013Co-Authors: D K Ivanou, M Starykevich, Aleksey D Lisenkov, M L Zheludkevich, S V Lamaka, M G S FerreiraAbstract:Abstract Anodic Coatings on magnesium ZE41 alloy were formed by DC plasma electrolytic oxidation (PEO) in spark regime in solution composed of NaOH, Na 2 SiO 3 and KF. The positive effect of poly(ethylene oxide) addition into the anodizing electrolyte on PEO process, anodic film porosity and its protective performance was described. Anodic films were sealed with hybrid epoxy-Silane formulation. The corrosion behavior of the coated ZE41 was studied through electrochemical impedance spectroscopy (EIS) in 0.6 M NaCl solution. Resulting duplex PEO/epoxy-Silane Coating provides good protective performance without significant signs of corrosion during 1 month of immersion test.