The Corrosion Behavior of Zn/Graphene Oxide Composite Coatings Fabricated by Direct Current Electrodeposition

Shen, Xixun; Sheng, Junwei; Xu, Qing; Cheng, DingXin

doi:10.1007/s11665-018-3461-0

Cited by 33 publications

(9 citation statements)

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“…It can be seen from Figure that for whether the pure zinc coating or the Zn‐TiN composite coatings, the relative weight undergoes a similar evolutionary process with the immersion time, that is, the relative weight first decreases from the value below zero to a lower negative value and subsequently begins to show an approximately linear increase and eventually enters a positive value region with the immersion time. The change of relative weight with the immersion time is consistent with the results obtained from the long‐term immersion experiments of Zn‐GO composite coatings reported recently, which illuminates that both pure zinc coatings and Zn‐TiN composite coatings firstly undergo a weight gaining stage before entering a normal weight losing stage. For the pure zinc coating and zinc composite coatings, the weight gaining stage should be attributed to the adsorption of the corrosion products such as the zinc hydroxide chloride and zinc oxide on the surface of the coatings, which is obviously consistent with the passivation behavior of the polarization curves mentioned above.…”

Section: Resultssupporting

confidence: 90%

“…It can be seen clearly from Figure that the incorporation of TiN nanoparticles has great influence on the mechanical properties of zinc matrix, and all the Zn‐TiN composite coatings exhibit higher microhardness than the pure Zn coating. This enhancement in the microhardness due to the incorporation of nanoparticles has actually been reported in other composite coatings . Several strengthening factors mainly involve the inhibition of plastic flow sourced from the effective blocking of nanoparticles on the dislocation motion, the refinement and the inherent high mechanical strength of nanoparticles .…”

Section: Resultssupporting

confidence: 69%

“…Moreover, the arrangement compactness of the papillary‐shaped clusters structures decreases and the gaps between these papillary‐shaped clusters structures become deeper. It has been suggested from several recently reported zinc‐based composite coatings that the diffusion and deposition of second‐phase particles on the surface of the prepared sample during electrodeposition can hinder the crystal growth and increase the nucleation sites for the reduction of metal ions, which may be the reason for the changes in the morphological and geometric characteristics of the Zn crystal with the concentrations of TiN nanoparticles in the electrolyte. Additionally, it can be also further revealed from the surface magnified images of these composite coatings that these micro‐sized papillary‐shaped clusters structures all hold an uneven microscopic surface with similar nanoscale protuberances.…”

Section: Resultsmentioning

confidence: 99%

“…However, the corrosion resistance of the composite coatings prepared under other conditions is not significantly improved compared with that of pure zinc coating. In addition, novel carbon materials such as carbon nanotubes and graphene oxide have recently also been used to strengthen zinc coating . For example, Li et al prepared a novel Zn‐GO composite coating from a choline chloride based deep eutectic solvent by pulse electrodeposition.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and corrosion behavior of electrodeposited Zn‐TiN composite coatings

Sheng

Shen

Wang

et al. 2019

Materials & Corrosion

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In this paper, the pure Zn coating and Zn‐TiN composite coatings containing four different concentrations of TiN particles were prepared on the carbon steel by direct current electrodeposition. The X‐ray diffraction and scanning electron microscopy were used to study the crystal size, preferred orientation, and surface morphology of these coatings. The results show that the incorporation of TiN particles refines the crystal size of the Zn coating and results in the formation of a special surface morphology with papillary‐shaped clusters structure that preferentially grows along the (100) crystallographic plane. Such a surface provides better hydrophobicity for the Zn‐TiN composite coatings. The corrosion behavior of these coatings was evaluated by potentiodynamic polarization, electrochemical impedance spectroscopy and the long‐term immersion test. The results show that the incorporation of TiN nanoparticles leads to a significant increase in corrosion resistance of the Zn coating and there is an optimal addition of TiN nanoparticles to provide a best corrosion resistance for the composite coatings. Additionally, the microhardness of prepared coatings was also evaluated.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructure and corrosion behavior of electrodeposited Zn‐TiN composite coatings

Sheng

Shen

Wang

et al. 2019

Materials & Corrosion

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“…За последние пять лет наблюдается интерес исследователей к получению и исследованию свойств композиционных электрохимических покрытий на основе никелевой, цинковой, оловянной матриц с включением наночастиц графена [15][16][17][18][19][20][21][22][23]. Включение наночастиц приводит, как правило, к значительному изменению кристаллической структуры осадков и размеров зерен осаждаемого металла, улучшению коррозионной стойкости композиционных покрытий, снижению коэффициентов трения и износа, приданию эффекта сухой смазки [19].…”

Section: Abstract: Graphene Composite Coatingsunclassified

Production and Properties of Composite Electrochemical Coatings With Electrochemically Dispersed Graphene Based on Nickel Matrix

Bratkov¹,

Yudina²,

Мельников³

et al. 2020

IVKKT

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In this work, the effect of addition of colloidal solutions of electrochemical exfoliated graphene (EEG) to the Watts bath on the process of obtaining composite coatings based on a nickel matrix was studied. It was found that the introduction of nanoparticle additives has a significant effect on the value of cathodic overvoltage during electro reduction of Ni2+. The strongest inhibition of the cathode process takes place with the introduction of 0.2 g/l of additives investigated. Further increase in the concentration of nanoparticles in the bath reduces the effect. The inhibition of the cathodic reduction of Ni2+ is associated with the adsorption of graphene nanoparticles on the active faces of growing nickel crystallites and the blocking of the accessible surface for Ni2+ reduction. Due to the increase in cathodic polarization during the deposition of the composite coating, the crystallites of the deposited nickel decrease in size and the texture of the crystal structure of the coating changes. According to energy dispersive spectroscopy data, carbon has been included in the composite coating. The carbon content in the coating increases with increasing concentration of nanoparticles in the working electrolyte. The inclusion of negatively charged nanoparticles of electrochemically dispersed graphene in the resulting precipitate becomes possible due to adsorption of Ni2+ and recharging of graphene nanoparticles. It was found that the optimal concentration of electrochemically dispersed graphene in the working electrolyte is 0.1-0.2 g/l. At a given nanoparticle content in the working bath, the porosity and roughness of the coatings decreases. The Tafel polarization curves for composite coating samples obtained in a 0.5M NaCl solution showed that the inclusion of graphene nanoparticles in the resulting coating leads to a shift of the corrosion potential to the negative area. With an increase in the carbon content in the coating, the shift in corrosion potentials increases, and the value of corrosion currents increases. For samples of composite coatings obtained at an EEG additive concentration of 0.1 g/l, a slight improvement in the protective properties is noted, which is associated with a decrease in the porosity of the coatings.

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Electrodeposited Nickel Coating Reinforced with Chlorophyll‐Reduced Graphene Oxide

et al. 2021

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Nickel composite coating reinforced with reduced graphene oxide is fabricated by pulse electrodeposition method from a surfactant‐free bath at different current densities. The reduction of graphene oxide is done by an ecofriendly method which uses chlorophyll (CHL) as the reducing agent. The CHL also acts as a stabilizer because of its amphiphilicity. Auger electron spectroscopy is used to study the surface morphology and characteristics of the deposited coatings. Nanoindentation is used to study the mechanical properties. Electrochemical techniques such as potentiodynamic polarization and electrochemical impedance spectroscopy are used to study the corrosion behavior in 3.5 wt% NaCl solution. The coatings are found to exhibit superior hardness, Young's modulus, and corrosion resistance when compared with the pure Ni coating. Hardness and corrosion resistance are found to improve almost tenfold at optimized condition. Scanning electron microscopy of the corroded surface of the coatings provides an insight into the corrosion process.

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The Corrosion Behavior of Zn/Graphene Oxide Composite Coatings Fabricated by Direct Current Electrodeposition

Cited by 33 publications

References 50 publications

Microstructure and corrosion behavior of electrodeposited Zn‐TiN composite coatings

Microstructure and corrosion behavior of electrodeposited Zn‐TiN composite coatings

Production and Properties of Composite Electrochemical Coatings With Electrochemically Dispersed Graphene Based on Nickel Matrix

Electrodeposited Nickel Coating Reinforced with Chlorophyll‐Reduced Graphene Oxide

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