Corrosion tests of nickel coatings prepared from a Watts-type bath

Rusu, D.; Ispas, Adriana; Bund, Andreas; Gheorghieş, C.; Cârâc, Geta

doi:10.1007/s11998-011-9343-0

Cited by 47 publications

(24 citation statements)

References 32 publications

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“…More so, composite particle has strong effect on the deposited surface structure, and the changes in deposition mechanism should be the main reason for morphology differences. The nucleation and the crystal growth could be attributed to the current density and potential, which is in agreement with previous reported result of [34]. No pores were observed on the surface of the Zn-7SnO 2 -0.3V.…”

Section: Sem/eds Resultssupporting

confidence: 92%

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Anti-Corrosion and Tribo-Mechanical Properties of Co-deposited Zn–SnO2 Composite Coating

Fayomi

Popoola

2015

Acta Metall. Sin. (Engl. Lett.)

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Zn-SnO 2 composite coatings were prepared by direct potential using electrolytic co-deposition technique from sulfate solution. The effect of Zn 2? and SnO 2 concentrations in deposited bath on the mechanical properties and morphological characteristics of the composite coatings were examined. The characterizations of the sample were analyzed using scanning electron microscopy couple with energy dispersive spectroscopy (SEM/EDS), X-ray diffraction (XRD) and atomic force microscopy (AFM). The electrochemical degradation behavior of the samples in 3.65 wt.% NaCl solution was studied using potentiodynamic polarization technique and characterized by high-resolution optical microscope. From all the fabricated composite coatings, obvious diffraction peaks were observed with Zn-7Sn-S-0.3V film with Zn 2 Sn 7 , Sn, Zn 2 Sn 5 and Zn phases, confirming the presence and formation of Zn-SnO 2 coating. The XRD pattern shows that the presences of SnO 2 particle remarkably play a major role in the precipitation and orientation of the alloy matrix. From the SEM/EDS and AFM results, the deposits show that composite particle and proper bath composition have strong influence on the microstructure. An enhanced corrosion resistance was attained as a result of the induced particles.

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Section: Sem/eds Resultssupporting

confidence: 92%

“…strong plane and Zn-7SnO 2 -0.3V produced a better phase as a result of smaller crystal. It is reported that current densities often influence the produced grain size, which could determine the phase composition of such coating [19,34]. Considering the decreased sulfur in bath due to Zn 2?…”

Section: Afm Studiesmentioning

confidence: 99%

Anti-Corrosion and Tribo-Mechanical Properties of Co-deposited Zn–SnO2 Composite Coating

Fayomi

Popoola

2015

Acta Metall. Sin. (Engl. Lett.)

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“…In line with study investigated by [10][11] microstructural modification is strongly affected by the degree of addition and the kind of particles incorporated. Deposition as a result of super saturated deposit causes agglomeration which leads to the production of harder and more resistant coatings [12].…”

Section: Introductionsupporting

confidence: 85%

“…This assertion was found true in respect to Zn-SiC-ZrO 2 content into the metal lattices resulted into solid structure thereby forming a suitable adhesion and enhancement of hardness properties. Comparison of the deposits shows that the irregularities of the particle embedded at the metal/film interface of the binary phase of SiC and ZrO 2 results to a reduction in the hardness value compare to the ternary phase which is in line with study by [7,10]. Figure 5 shows the thermo-mechanical characteristics of the deposited alloy at 200 0 C in 4 h with isothermal furnace route.…”

Section: Physical and Mechanical Behaviour Of The Fabricated Coatingssupporting

confidence: 76%

Improving the properties of mild steel by ternary multilayer composite coating via electrodeposition route

Fayomi¹,

Popoola²,

Monyai³

2017

Bull. Chem. Soc. Eth.

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ABSTRACT.A wide range of metal-oxides exhibit fascinating properties and multiple functionalities that could address challenge of physical and mechanical deterioration of materials in service. In this study, Zn-ZrO2, Zn-SiC and Zn-ZrO2-SiC composite coating was fabricated from zinc based sulphate electrolyte at constant current density, depth of immersion, distance between anode and cathode with time of deposition. The effect of particle on the physical behaviour of the coating was examined by coating gauge tester for the coating thickness and coating texture. The mechanical properties in term of hardness and wear characteristics were examined using high diamond micro-hardness tester and three body abrasive MTR-300 testers with dry sand rubber wheel apparatus with 5 N and 15 N, respectively. The coating stability in harsh region was examined with isothermal furnace at 200 o C for 4 h. The structural behaviour was investigated using scanning electron microscope attached with energy dispersion spectroscopy (SEM/EDS). The result shows that significant improvements in wear and hardness properties are linked to the microstructural modification of the coating as a result of the embedded particulate. The strengthening behaviour was improved with about 98% of coating efficiency. The progression of the coating thickness and texture were in line with other results obtained.

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“…Effort to strengthen this atmospheric, high temperature corrosion and mechanical deformation on most fabricated components, moving vessels and equipment is thus a concern of recent [7,8]. Alloy development with thin film codeposition for the purpose of combating high temperature corrosion and improved mechanical value is now gaining ground [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Microstructure, tribological and mechanical strengthening effect of multiphase Zn/ZrO2-SiC electrodeposited composite coatings

Fayomi

Popoola

Oheiza

et al. 2015

Int J Adv Manuf Technol

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In an attempt to improve the mechanical and thermal resilient properties of mild steel, Zn-ZrO 2 -SiC composite coating was fabricated from zinc-based sulphate electrolyte with incorporated composite particles of ZrO 2 /SiC at 2.0 A/cm 2 for 10 min. The effects of particle on the mechanical properties were examined using scanning electron microscope attached with energy dispersion spectroscopy and atomic force microscopy. The micro-hardness and wear resistance behaviour were determined with high diamond microhardness tester and three body abrasive MTR-300 testers with dry sand rubber wheel apparatus with 5 N. The fabricated coating was thermally heated at 200°C for 4 h to evaluate the coating stability. From the results, a modification in the microstructure and topographic orientation as a result of incorporated composite was noticed on the zinc matrix. The mechanical and thermal properties were observed to be considerably improved by the incorporation of the ZrO 2 /SiC weight fraction. A significant improvement in wear and hardness properties were also obtained for the multiphase embedded coatings.

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Corrosion tests of nickel coatings prepared from a Watts-type bath

Cited by 47 publications

References 32 publications

Anti-Corrosion and Tribo-Mechanical Properties of Co-deposited Zn–SnO2 Composite Coating

Anti-Corrosion and Tribo-Mechanical Properties of Co-deposited Zn–SnO2 Composite Coating

Improving the properties of mild steel by ternary multilayer composite coating via electrodeposition route

Microstructure, tribological and mechanical strengthening effect of multiphase Zn/ZrO2-SiC electrodeposited composite coatings

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