Nickel–boron electrochemical properties investigations

Kanta, A.-F.; Poelman, M.; Vitry, Véronique; Delaunois, Fabienne

doi:10.1016/j.jallcom.2010.05.168

Cited by 48 publications

(22 citation statements)

References 17 publications

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“…6(b)), in the Nyquist plot. This is indicative of a physicochemical phenomenon occurring at the metal/coating/solution interface [24]. Similar results have been reported for electroless Ni-low B coatings [14].…”

Section: Electrochemical Impedance Spectroscopysupporting

confidence: 84%

Corrosion Resistance of Electroless Ni-B-W-Mo Coatings Using Electrochemical Impedance Spectroscopy

Mukhopadhyay¹,

Barman²,

Sahoo³

2019

Port. Electrochim. Acta

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Quaternary NiB -W-Mo coatings were deposited on AISI 1040 steel by the electroless method. Some of the specimens were heat-treated at 300, 350, 400, 450 and 500 °C, for 1 hour. The deposited coatings contained a high weight percentage of W, and a low B content was detected by energy dispersive X-ray analysis. The coatings in as-deposited state were amorphous, and heat treatment resulted in crystallization with the precipitation of borides. W and Mo were present in the coatings, mainly in a solid solution form. The surface morphology study revealed densely nodulated structures, which are pertinent for sodium borohydride reduced electroless nickel coatings. Electrochemical impedance spectroscopy studies were conducted to determine the corrosion resistance of the as-deposited and heat-treated coatings in a 3.5% NaCl electrolyte. The corroded surfaces were observed under scanning electron microscope, to study the corrosion mechanism.

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Section: Electrochemical Impedance Spectroscopysupporting

confidence: 84%

Corrosion Resistance of Electroless Ni-B-W-Mo Coatings Using Electrochemical Impedance Spectroscopy

Mukhopadhyay¹,

Barman²,

Sahoo³

2019

Port. Electrochim. Acta

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“…The reason for determining leads in the EDS analysis explained by using Lead Tungstate (PbWO 4 ) as a stabilizer. Introducing Lead (Pb) onto coating provides uniformity and shifted adhesion strength [12], [16], [17]. Moreover, the 'cauliflower' like microstructure which can be seen in Fig.…”

Section: Resultsmentioning

confidence: 99%

Effect of Heat Treatments for Electroless Deposited Ni-B and Ni-W-B Coatings on 7075 Al Alloy

Yildiz¹,

Genel²,

Gülmez³

2017

IJMMM

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“…A quick view of the pictures reveals that the samples are quite affected by the corrosion in saline environment. In almost every sample, localized cracks are found to be present which may be indicative of preferential dissolution at the boundaries of adjacent grains and columns (23). Also black spots can be observed which are more prominent for samples annealed at 250ºC (Fig.…”

Section: Corrosion Mechanismmentioning

confidence: 91%

Study of Potentiodynamic Polarization Behaviour of Electroless Ni-B Coatings and Optimization using Taguchi Method and Grey Relational Analysis

Das¹,

Sahoo²

2011

JMMCE

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Electroless nickel coatings are very popular for their corrosion resistant actions. The present article attempts to study the corrosion behaviour of electroless NiB coatings by varying the coating parameters viz. bath temperature, reducing agent concentration and nickel source concentration together with the annealing temperature. The electrochemical parameters viz., corrosion potential and corrosion current density are evaluated with the help of potentiodynamic polarization experimentation. Taguchi based Grey analysis is employed in order to optimize this multiple response problem and the optimal combination of parameters for maximum corrosion resistance for NiB coatings is presented. Moreover, analysis of variance reveals that bath temperature and concentration of nickel source have significant influence on the corrosion performance of the coating. The microstructure characterization of the coating is also conducted with the help of scanning electron microscopy, energy dispersive X-ray analysis and X-ray diffraction analysis. The NiB coating in general exhibits a nodular structure and turns crystalline with heat treatment. The corroded surface exhibits cracks and black spots which imply the occurrence of localized corrosion.

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Nickel–boron electrochemical properties investigations

Cited by 48 publications

References 17 publications

Corrosion Resistance of Electroless Ni-B-W-Mo Coatings Using Electrochemical Impedance Spectroscopy

Corrosion Resistance of Electroless Ni-B-W-Mo Coatings Using Electrochemical Impedance Spectroscopy

Effect of Heat Treatments for Electroless Deposited Ni-B and Ni-W-B Coatings on 7075 Al Alloy

Study of Potentiodynamic Polarization Behaviour of Electroless Ni-B Coatings and Optimization using Taguchi Method and Grey Relational Analysis

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