Cellulose microfibers (CMFs) reinforced smart self-healing polymeric composite coatings for corrosion protection of steel

The use of organic coating for the metals has been widely being used to protect the surface against corrosion. Polymeric coating incorporated with Nanocontainers loaded with inhibitor and self-healing provides better corrosion resistance. Cellulose microfibers (CMFs) used as smart carriers were synthesized and loaded with dodecylamine (DOC)-inhibitor and polyethyleneimine (PEI)-both inhibitor and self-healing agents. Smart polymeric coatings were developed by mixing CMF/DOC and CMFs/PEI into the epoxy matrix. Reference coatings (that has only CMFs) were also prepared for a compersion. Scanning electron microscope (SEM), X-ray diffraction spectroscopy (XRD), Fourier transform infrared spectroscopy (FTIR) and thermal gravitational analysis (TGA) were used to confirm the loading of DOC and PEI onto the CMFs. UV-vis analysis indicates that the self-release of inhibitor from CMFs is sensitive to pH of the solution and the immersion time. Recovery of controlled surface damage confirms the decent self-healing ability of the prepared smart coatings is due to the efficient release of inhibitor (DOC) and self-healing agent (PEI) in the damaged area leading to the formation of a protective film. Electrochemical impedance spectroscopy (EIS) results demonstrate that corrosion resistance of the smart coating increases with an increase in immersion time which is due to the progressive release of inhibitors from CMFs in response to the pH change. Therefore, smart coatings demonstrate superior properties as compared to the reference coatings. The study reveals the polymeric composite coatings have potential to inhibit the corrosion of steel for oil and gas industry.

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Zn-Co-CeO2 vs. Zn-Co Coatings: Effect of CeO2 Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings

Metals ◽

10.3390/met11050704 ◽

2021 ◽

Vol 11 (5) ◽

pp. 704

Author(s):

Marija Riđošić ◽

Nebojša D. Nikolić ◽

Asier Salicio-Paz ◽

Eva García-Lecina ◽

Ljiljana S. Živković ◽

...

Keyword(s):

Corrosion Resistance ◽

Healing Rate ◽

Electrochemical Impedance ◽

Composite Coatings ◽

Self Healing ◽

Kelvin Probe ◽

Artificial Defect ◽

Volta Potential ◽

Superior Corrosion Resistance ◽

The Stability

Electrodeposition and characterization of novel ceria-doped Zn-Co composite coatings was the main goal of this research. Electrodeposited composite coatings were compared to pure Zn-Co coatings obtained under the same conditions. The effect of two ceria sources, powder and home-made sol, on the morphology and corrosion resistance of the composite coatings was determined. During the electrodeposition process the plating solution was successfully agitated in an ultrasound bath. The source of the particles was found to influence the stability and dispersity of plating solutions. The application of ceria sol resulted in an increase of the ceria content in the resulting coating and favored the refinement from cauliflower-like morphology (Zn-Co) to uniform and compact coral-like structure (Zn-Co-CeO2 sol). The corrosion resistance of the composite coatings was enhanced compared to bare Zn-Co as evidenced by electrochemical impedance spectroscopy and scanning Kelvin probe results. Zn-Co doped with ceria particles originating from ceria sol exhibited superior corrosion resistance compared to Zn-Co-CeO2 (powder) coatings. The self-healing rate of artificial defect was calculated based on measured Volta potential difference for which Zn-Co-CeO2 (sol) coatings exhibited a self-healing rate of 73.28% in a chloride-rich environment.

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Self-Healing Performance of Multifunctional Polymeric Smart Coatings

Polymers ◽

10.3390/polym11091519 ◽

2019 ◽

Vol 11 (9) ◽

pp. 1519 ◽

Cited By ~ 9

Author(s):

Sehrish Habib ◽

Adnan Khan ◽

Muddasir Nawaz ◽

Mostafa Sliem ◽

Rana Shakoor ◽

...

Keyword(s):

Electrochemical Impedance ◽

Linseed Oil ◽

Steel Substrate ◽

Urea Formaldehyde ◽

Nanocomposite Coatings ◽

Self Healing ◽

Ph Change ◽

Polymeric Nanocomposite ◽

Smart Coatings ◽

Healing Agent

Multifunctional nanocomposite coatings were synthesized by reinforcing a polymeric matrix with halloysite nanotubes (HNTs) loaded with corrosion inhibitor (NaNO3) and urea formaldehyde microcapsules (UFMCs) encapsulated with a self-healing agent (linseed oil (LO)). The developed polymeric nanocomposite coatings were applied on the polished mild steel substrate using the doctor’s blade technique. The structural (FTIR, XPS) and thermogravimetric (TGA) analyses reveal the loading of HNTs with NaNO3 and encapsulation of UFMCs with linseed oil. It was observed that self-release of the inhibitor from HNTs in response to pH change was a time dependent process. Nanocomposite coatings demonstrate decent self-healing effects in response to the external controlled mechanical damage. Electrochemical impedance spectroscopic analysis (EIS) indicates promising anticorrosive performance of novel nanocomposite coatings. Observed corrosion resistance of the developed smart coatings may be attributed to the efficient release of inhibitor and self-healing agent in response to the external stimuli. Polymeric nanocomposite coatings modified with multifunctional species may offer suitable corrosion protection of steel in the oil and gas industry.

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Improved Corrosion Resistance and Increased Hardness of Copper Substrates from Cu-Ni/Ni-P Composite Coatings

MRS Advances ◽

10.1557/adv.2020.226 ◽

2020 ◽

Vol 5 (40-41) ◽

pp. 2129-2137 ◽

Cited By ~ 1

Author(s):

Wenwen Dou ◽

Wen Li ◽

Yuchen Cai ◽

Mengyao Dong ◽

Xiaojing Wang ◽

...

Keyword(s):

Corrosion Resistance ◽

Electrochemical Impedance ◽

Composite Coatings ◽

Copper Substrate ◽

Electrolytic Deposition ◽

Deposition Method ◽

Nacl Solution ◽

Current Densities ◽

Superior Corrosion Resistance ◽

Deposition Conditions

ABSTRACTTo improve the corrosion resistance and to increase the hardness of copper substrate in marine environment, the Cu-Ni/Ni-P composite coatings were prepared on the copper substrate using the galvanostatic electrolytic deposition method. The deposition current densities were explored to find the optimized deposition conditions for forming the composite coatings. Corrosion resistance properties were analyzed using the polarization curves and electrochemical impedance spectroscopy (EIS). Considering the corrosion resistance and hardness, the −20 mA/cm2 was selected to deposit Cu-Ni coatings on copper substrate and the −30 mA/cm2 was selected to deposit Ni-P coating on the Cu-Ni layer. The Cu-Ni/Ni-P composite coatings not only exhibited superior corrosion resistance compared to single Cu-Ni coating in 3.5 wt.% NaCl solution, but also showed much better mechanical properties than single Cu-Ni coating.

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Cerium Dioxide Nanoparticles as Smart Carriers for Self-Healing Coatings

Nanomaterials ◽

10.3390/nano10040791 ◽

2020 ◽

Vol 10 (4) ◽

pp. 791 ◽

Cited By ~ 1

Author(s):

Sehrish Habib ◽

Eman Fayyad ◽

Muddasir Nawaz ◽

Adnan Khan ◽

Rana A. Shakoor ◽

...

Keyword(s):

Corrosion Inhibition ◽

Cerium Dioxide ◽

Electrochemical Impedance ◽

Protective Layer ◽

Vital Role ◽

Epoxy Coating ◽

Gravimetric Analysis ◽

Protective Film ◽

Self Healing ◽

Vis Spectroscopy

The utilization of self-healing cerium dioxide nanoparticles (CeO2), modified with organic corrosion inhibitors (dodecylamine (DDA) and n-methylthiourea (NMTU)), in epoxy coating is an efficient strategy for enhancing the protection of the epoxy coating and increasing its lifetime. Fourier transform infrared (FTIR) spectroscopy analysis was used to confirm the loading and presence of inhibitors in the nanoparticles. Thermal gravimetric analysis (TGA) measurement studies revealed the amount of 25% and 29.75% w/w for NMTU and DDA in the nanoparticles, respectively. The pH sensitive and self-release behavior of modified CeO2 nanoparticles is confirmed through UV-vis spectroscopy and Zeta potential. It was observed, through scanning electron microscopy (SEM), that a protective layer had been formed on the defect site separating the steel surface from the external environment and healed the artificially created scratch. This protective film played a vital role in the corrosion inhibition of steel by preventing the aggressiveness of Cl− in the solution. Electrochemical impedance spectroscopy (EIS) measurements exhibited the exceptional corrosion inhibition efficiency, reaching 99.8% and 95.7% for the modified coating with DDA and NMTU, respectively, after five days of immersion time.

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MICROSTRUCTURE AND ELECTROCHEMICAL PROPERTIES OF Ni–B/GO ULTRASONIC-ASSISTED COMPOSITE COATINGS

Surface Review and Letters ◽

10.1142/s0218625x1950080x ◽

2019 ◽

Vol 26 (10) ◽

pp. 1950080

Author(s):

JIBO JIANG ◽

HAOTIAN CHEN ◽

LIYING ZHU ◽

YAOXIN SUN ◽

WEI QIAN ◽

...

Keyword(s):

Corrosion Resistance ◽

Photoelectron Spectroscopy ◽

Electrochemical Impedance ◽

Composite Coatings ◽

Ultrasonic Field ◽

Protective Material ◽

X Ray ◽

Electrochemical Tests ◽

Ultrasonic Assisted ◽

Corrosive Environments

Graphene oxide (GO) sheet and ultrasonic field (UF) were successfully employed to produce Ni–B/GO and UF–Ni–B/GO composite coatings on Q235 mild steel by electroless plating. The composite coatings’ structure and surface morphology were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). Results showed that GO was successfully co-deposited in the Ni–B alloy. Moreover, UF–Ni–B/GO composite coatings have smoother surface and thicker cross-section than others. The microhardness and corrosion resistance of the sample coatings were determined using Vickers hardness tests, Tafel electrochemical tests and electrochemical impedance measurements (EIS) in 3.5[Formula: see text]wt.% NaCl solution to receive the effect of GO and ultrasonic. The findings indicated that UF–Ni–B/GO exhibited optimum hardness (856[Formula: see text]HV) and enhanced corrosion resistance (6.38 [Formula: see text][Formula: see text] over the Ni–B and Ni–B/GO coatings. Due to these interesting properties of the coating, it could be used as a protective material in the automotive and aerospace industries for parts of machines that were manipulated in high temperature and corrosive environments.

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Electrodeposition and Hardness and Corrosion Resistance Propertie of Ni/Nano-B4C Composite Coatings

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.399-401.2055 ◽

2011 ◽

Vol 399-401 ◽

pp. 2055-2060

Author(s):

Ji Bo Jiang ◽

Wei Dong Liu ◽

Lei Zhang ◽

Qing Dong Zhong ◽

Yi Wang ◽

...

Keyword(s):

Corrosion Resistance ◽

Electrochemical Impedance ◽

Composite Coatings ◽

Corrosion Property ◽

Pure Nickel ◽

Plating Bath ◽

Tafel Polarization ◽

Nickel Coatings ◽

Eis Measurements ◽

Steel Substrates

Ni–B4C composite coatings on carbon steel substrates with various contents of B4C nano-particulates were prepared by electrodeposition in Ni plating bath containing B4C nano-particulates. Microhardness, Scanning Electron Microscopy (SEM), Tafel polarization and Electrochemical Impedance Spectroscopy (EIS) measurements were used to compare pure nickel coatings and Ni–B4C composite coatings. Pure Ni coating microhardness is lower than that of Ni–B4C coatings and the microhardness of the composite coatings increases with the increase of the content of B4C nano-particulates. The effects of various contents of B4C nano-particulates on the corrosion resistance were investigated and it was found that the best anti–corrosion property of Ni–B4C composite coatings is at 6 g/L B4C in the bath formulation.

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Corrosion protective properties of coatings doped with inhibitors

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-07-2013-1281 ◽

2014 ◽

Vol 61 (6) ◽

pp. 416-422 ◽

Cited By ~ 6

Author(s):

Mansoureh Parsa ◽

Seyed Mohammad Ali Hosseini ◽

Zahra Hassani ◽

Effat Jamalizadeh

Keyword(s):

Corrosion Resistance ◽

Corrosion Protection ◽

Electrochemical Impedance ◽

Sol Gel ◽

Titania Nanoparticles ◽

Self Healing ◽

Properties Of Coatings ◽

Ethylene Imine ◽

Protective Properties ◽

Content Type

Purpose – The purpose of this paper was to study the corrosion resistance of water-based sol-gel coatings containing titania nanoparticles doped with organic inhibitors for corrosion protection of AA2024 alloy. Design/methodology/approach – The coatings were obtained using tetraethylorthosilicate, 3-glycidoxypropyltrimethoxysilane, titanium (IV) tetrapropoxide and poly(ethylene imine) polymer as cross-linking agents. As corrosions inhibitors, 2-mercaptobenzoxazole and salicylaldoxime were incorporated into the sol-gel for the improvement of the corrosion resistance. The corrosion protection performance of coatings was studied using the potentiodynamic scan and the electrochemical impedance spectroscopy (EIS) methods. Atomic force microscopy was used to investigate surface morphology of the coatings. Findings – The results indicated that doping the sol-gel coatings with inhibitors leads to improvement of the corrosion protection. The comparison of doped coatings confirmed that corrosion protection performance of the sol-gel coatings doped with 2-mercaptobenzoxazole was better than for the sol-gel coatings doped with salicylaldoxime. Also the EIS results verified self-healing effects for the sol-gel coatings doped with 2-mercaptobenzoxazole. Originality/value – This paper indicates 2-mercaptobenzoxazole and salicylaldoxime can be added as corrosion inhibitors to sol-gel coatings to improve their corrosion protective properties for AA2024 alloy.

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HIGH CORROSION RESISTANCE OF NI-P/NANO-SIO2 ELECTROLESS COMPOSITE COATINGS

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194512002784 ◽

2012 ◽

Vol 05 ◽

pp. 810-816 ◽

Cited By ~ 1

Author(s):

S.R. Allahkaram ◽

T. Rabizadeh

Keyword(s):

Corrosion Resistance ◽

Electrochemical Impedance ◽

Composite Coatings ◽

Carbon Steels ◽

Nano Particles ◽

Chemical Compositions ◽

High Corrosion Resistance ◽

Coating Type ◽

Corrosion Behaviors ◽

Electroless Ni

The process of electroless plating Ni - P and Ni - P /nano- SiO 2 on API-5L X65 carbon steels was improved. The Ni - P /nano- SiO 2 composite coatings were prepared from the bathes containing different concentrations of nano- SiO 2 particles. The coatings surface and morphologies were observed via scanning electron microscopy (SEM). The chemical compositions were analyzed by EDAX. The corrosion behaviors were evaluated by electrochemical impedance spectroscopy tests. The experimental results indicated that SiO 2 nano-particles co-deposited but some agglomeration occurred. Micro-hardness of electroless Ni - P - SiO 2 composite coatings increased due to the existence of nano-particles. Corrosion tests showed that both electroless Ni - P and Ni - P /nano- SiO 2 composite coatings demonstrated significant improvement of corrosion resistance of substrate in salty atmosphere and latter coating type appeared to offer a better corrosion protection.

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Hybrid nano/micro-particles for Increased Steel Corrosion Resistance: Particles’ Alterations with pH Change and Steel Behavior in Cement Extract and Mortar

MRS Proceedings ◽

10.1557/opl.2013.1126 ◽

2013 ◽

Vol 1612 ◽

Cited By ~ 2

Author(s):

D.A. Koleva ◽

J. Hu ◽

V. Milkova ◽

K. van Breugel

Keyword(s):

Corrosion Resistance ◽

Steel Surface ◽

Steel Corrosion ◽

Alkaline Solutions ◽

Self Healing ◽

Low Carbon ◽

Hybrid Particles ◽

Ph Change ◽

Micro Particles ◽

Steel Corrosion Resistance

ABSTRACTHybrid nano/micro particles were investigated for their possibility to re-structure within local pH alterations, release certain active substance and further contribute to increased steel corrosion resistance. Two aspects with regard to corrosion control and self-healing in cement-based materials are discussed: the first aspect deals with the electrochemical performance of low carbon steel electrodes (St37) in model alkaline solutions (cement extract) in the presence of 4.9.10-4 g/l hybrid particles i.e. cement extract, containing PDADMAC (poly (diallyl, dimethyl ammonium chloride) / PAA (Poly (acrylic acid)/ PDADMAC over a CaO core. The second aspect refers to the performance of reinforcing steel (FeB500 HKN) in mortar specimens, containing hybrid particles in the mixing water in concentration of 3.6×10-4 wt. % per mortar weight. The main objective was to determine if these hybrids will lead to increased corrosion resistance of the steel surface layers, generally formed in the hereby investigated environmental medium (both liquid i.e. cement extract and solid i.e. mortar). Further, it was expected that when chlorides are involved, as corrosion accelerating factor, the presence of hybrid particles will delay corrosion initiation and will therefore lead to increased corrosion resistance. The results denote for indeed superior corrosion performance of steel in chloride-free and chloride containing medium, when hybrid particles are involved. The responsible mechanisms are related to increased barrier effects of the formed layer and self-repair upon morphological alterations of the hybrid particles, “nucleation sites effects” and/or Ca-core “release” on locally active (anodic) areas on the steel surface.

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Ni/cerium Molybdenum Oxide Hydrate Microflakes Composite Coatings Electrodeposited from Choline Chloride: Ethylene Glycol Deep Eutectic Solvent

Materials ◽

10.3390/ma13040924 ◽

2020 ◽

Vol 13 (4) ◽

pp. 924 ◽

Cited By ~ 1

Author(s):

Juliusz Winiarski ◽

Anna Niciejewska ◽

Jacek Ryl ◽

Kazimierz Darowicki ◽

Sylwia Baśladyńska ◽

...

Keyword(s):

Corrosion Resistance ◽

Composite Coating ◽

Molybdenum Oxide ◽

Composite Coatings ◽

Choline Chloride ◽

Active Form ◽

Deep Eutectic Solvent ◽

Corrosion Process ◽

Self Healing ◽

Oxide Hydrate

Cerium molybdenum oxide hydrate microflakes are codeposited with nickel from a deep eutectic solvent-based bath. During seven days of exposure in 0.05 M NaCl solution, the corrosion resistance of composite coating (Ni/CeMoOxide) is slightly reduced, due to the existence of some microcracks caused by large microflakes. Multielemental analysis of the solution, in which coatings are exposed and the qualitative changes in the surface chemistry (XPS) show selective etching molybdenum from microflakes. The amount of various molybdenum species within the surface of coating nearly completely disappear, due to the corrosion process. Significant amounts of Ce3+ compounds are removed, however the corrosion process is less selective towards the cerium, and the overall cerium chemistry remains unchanged. Initially, blank Ni coatings are covered by NiO and Ni(OH)2 in an atomic ratio of 1:2. After exposure, the amount of Ni(OH)2 increases in relation to NiO (ratio 1:3). For the composite coating, the atomic ratios of both forms of nickel vary from 1:0.8 to 1:1.3. Despite achieving lower corrosion resistance of the composite coating, the applied concept of using micro-flakes, whose skeleton is a system of Ce(III) species and active form are molybdate ions, may be interesting for applications in materials with potential self-healing properties.

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