Zn–ZrO2 nanocomposite coatings: Elecrodeposition and evaluation of corrosion resistance

Vathsala, K.; Venkatesha, T. V.

doi:10.1016/j.apsusc.2011.05.067

Cited by 137 publications

(55 citation statements)

References 27 publications

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“…The improvement can be attributed to the formation of favourable intermetallic phases in the alloy, which are suspected to behave like true compound. The presences of these phases are concluded to mitigate external forces and they act as dislocation motion barrier with attendant reduction in grain growth [31,32]. This is in line with SEM observations that reflect fine and uniform grain sizes, which confer surface strengthening effects on materials.…”

Section: Thermo-mechanical Analysissupporting

confidence: 67%

Study of Particle Incorporation and Performance Characteristic of Aluminium Silicate-Zirconia Embedded on Zinc Rich Coatings for Corrosion and Wear Performance

Fayomi¹,

Popoola²,

Ige³

et al. 2017

Asian J. Chem.

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Composite coatings of Zn-Al6O13Si2 and Zn-Al6O13Si2-ZrO2 were electroplated on mild steel from Zn 2+ ions bath and homogeneously dispersed nano Al6O13Si2-ZrO2 particulates were achieved. The corrosion resistance characteristics of the deposited coatings were evaluated by linear polarization method. The microstructural properties of the multilayer produce coatings were examined by scanning electron microscope equipped with energy dispersive spectrometer, X-ray diffraction and atomic force microscope. The thermal deformation were observed in 250 ºC for 4 h and mechanical properties of the composite coatings were investigated using diamond base Dura scan microhardness tester. From the observed results, it was shown that the incorporation of particles into the electrolyte change the microstructure characteristics of developed composite and improved drastically the thermomechanical performance of the coatings.

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Section: Thermo-mechanical Analysissupporting

confidence: 67%

Study of Particle Incorporation and Performance Characteristic of Aluminium Silicate-Zirconia Embedded on Zinc Rich Coatings for Corrosion and Wear Performance

Fayomi¹,

Popoola²,

Ige³

et al. 2017

Asian J. Chem.

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“…ZrO 2 particles are successfully incorporated into matrices such as Ni. [3][4][5], Cu [6], Zn [7] and Co [8]. In all cases ZrO 2 improves both mechanical (microhardness, wear resistance) and corrosion resistance properties of the coatings.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Cr–ZrO2 composite coatings electrodeposited from Cr(III) bath

Bikulčius¹,

Češūnienė²,

Selskienė³

et al. 2018

chemija

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The aim of this work was to incorporate ZrO 2 particles into a Cr matrix within the research work aimed at obtaining metal matrix composite coatings (CrZrO 2 ) under direct current and to evaluate their protective properties. A CrZrO 2 composite coating was deposited from an electrolyte based on trivalent chromium sulphate with formate-urea as a complexing agent containing various concentrations of ZrO 2 . Cross-section investigations have revealed that ZrO 2 particles incorporated into the Cr coating are uniformly distributed. The results indicate that ZrO 2 particles influence the microhardness, morphology and corrosion behaviour of Cr-ZrO 2 composite coatings obtained from the Cr(III) bath. Keywords: zirconium, electrodeposited films, SEM, XPS, EIS, interfaces INTRODUCTIONHard chromium electrodeposition is extensively used in modern industry as it provides good corrosion and wear resistances of the coatings obtained. Commonly, chromium coatings are deposited from hazardous hexavalent chromium baths. In view of a very high toxicity of Cr(VI) compounds, the development of an alternative hexavalent chromium plating process is urgently needed. According to the EU Regulation (EC) No. 1907/2006 the use of chromium trioxide baths for functional and decorative chromium plating will be forbidden or severely limited after 1 September 2017.Among many potential alternatives, trivalent chromium (Cr(III)) plating is considered as a very promising technology to replace conventional hexavalent Cr plating. Inasmuch as Cr coatings deposited in Cr(III) baths do not feature such good properties as Cr coatings deposited in Cr(VI) baths, efforts have been made to improve them by various methods.Electrochemical codeposition of inert particles in a metal matrix is a suitable technique to produce composite materials with new exploitation properties. Different hard dispersion phases distinguish themselves for different electrical conductivity and surface charge, therefore, to incorporate one or another hard disperse phase into a metallic matrix, specific deposition conditions are required [1].One of popular ceramic particles is ZrO 2 . It is known [2,3] that ZrO 2 has many superior properties, such as high G. Bikulčius, A. Češūnienė, A. Selskienė, A. Grigucevičienė, V. Jasulaitienė The aim of this work was to form a Cr(III)-ZrO 2 composite in an environment-friendly Cr(III) bath under the conditions of constant current and to study the incorporation of ZrO 2 disperse particles into the Cr matrix, the elemental composition of the Cr-ZrO 2 composite, surface microhardness (HV), surface morphology (SEM, XPS) and corrosion resistance (OCP, Tafel and EIS). EXPERIMENTALCr-ZrO 2 composite coatings were deposited from the Cr(III) bath containing Cr 2 (SO 4 ) 3 6H 2 O (150 g l -1 ), H 3 BO 3 (30 g l -1 ), Na 2 SO 4 (60 g l -1 ), Al 2 (SO4) 3 18H 2 O (120 g l -1 ), NaF (20 g l -1 ), HCOONa (27 g l -1 ), NH 2 COONH 2 (g l -1 ) under a 30 l h -1 agitation flow of compressed air with a direct current density of 0.2 A cm -2 and pH 2.0 at 20°C. This...

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“…Another aspect of the zinc application is its lower cost compared to other industrial materials. The safe exploitation of the zinc is, to a certain degree, limited, due to the aggressive nature of an environment that contains industrial pollutants, which requires additional efforts to increase corrosion resistance [6][7][8][9]. For example, the alloying of Zn with some metals, such as Mn, Co, Ni, etc., can be applied for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Influence of Organic Additives and of Stabilized Polymeric Micelles on the Metalographic Structure of Nanocomposite Zn and Zn-Co Coatings

Boshkov¹

2017

Port. Electrochim. Acta

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The peculiarities of the metallographic structure of electrodeposited nanocomposite polymeric modified Zn and Zn-Co (1 wt.%) alloy coatings are described and discussed. These coatings are obtained from usual electrochemical baths for Zn and Zn-Co alloys, but with the addition of stabilized polymeric micelles (SPM). The latter are of core-shell type, and are based on polypropylene oxide (hydrophobic core) and polyethylene oxide (hydrophilic shell). These coatings and their polymeric modified nano-composites are investigated with X-ray (XRD) method, which reveals changes in the metallographic structure as a result of the presence or absence of organic additives (wetting agent and brightener) and SPMs. The possible reasons for the changes observed are commented. In addition, cyclic voltammetry method (CVA) is applied in order to clarify the influence of the applied additives and of SPM on the cathodic (deposition) and anodic (dissolution) processes.

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Zn–ZrO2 nanocomposite coatings: Elecrodeposition and evaluation of corrosion resistance

Cited by 137 publications

References 27 publications

Study of Particle Incorporation and Performance Characteristic of Aluminium Silicate-Zirconia Embedded on Zinc Rich Coatings for Corrosion and Wear Performance

Study of Particle Incorporation and Performance Characteristic of Aluminium Silicate-Zirconia Embedded on Zinc Rich Coatings for Corrosion and Wear Performance

Characterization of Cr–ZrO2 composite coatings electrodeposited from Cr(III) bath

Influence of Organic Additives and of Stabilized Polymeric Micelles on the Metalographic Structure of Nanocomposite Zn and Zn-Co Coatings

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