Electroless Deposition of Nickel-Boron Alloys Mechanism of Process, Structure, and Some Properties of Deposits

Gorbunova, K.M.; Ivanov, M. V.; Моисеев, В. П.

doi:10.1149/1.2403514

Cited by 127 publications

(42 citation statements)

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“…There have been several propositions regarding the reaction mechanism of electroless Ni-B coatings, but one of the mechanisms proposed by Gorbunova et al [19] is well supported by experimental evidence. The proposed scheme for the reaction mechanism of nickel boron plating consists of mainly three steps:…”

Section: Experimental Details Materials and Methodsmentioning

confidence: 96%

Electrochemical Impedance Spectroscopy of Ni-B Coatings and Optimization by Taguchi Method and Grey Relational Analysis

Das¹,

Sahoo²

2011

Port. Electrochim. Acta

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Electroless nickel coatings possess several advantages over electroplating such as ability to coat any material and with uniform thickness. Besides, these coatings are used mainly for their wear resistance and corrosion resistance applications. The present study addresses the corrosion behavior of the coating based on electrical impedance spectroscopy. The effect of the four parameters viz. bath temperature, reducing agent concentration, nickel source concentration and annealing temperature, on the electrochemical characteristics (charge transfer resistance and double layer capacitance) are studied with the help of Taguchi method and grey relational analysis. It is found that the bath temperature has the most significant influence on the corrosion behavior of the coating followed by nickel source concentration. The microstructural characterization of the coating is done with the help of scanning electron microscope, X-ray diffraction analysis and energy dispersive X-ray analysis.

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Section: Experimental Details Materials and Methodsmentioning

confidence: 96%

Electrochemical Impedance Spectroscopy of Ni-B Coatings and Optimization by Taguchi Method and Grey Relational Analysis

Das¹,

Sahoo²

2011

Port. Electrochim. Acta

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“…Reagent-grade chemicals and distilled water were used for the preparation of all the electrolytes and the pH was adjusted to 4.8±0.2 and 13.5±0.2 with H 2 SO 4 or NaOH in Ni-P and Ni-B-W plating baths, respectively. The temperature of the baths was maintained at 90±2°C for Ni-P and 88±2°C for Ni-B-W.…”

Section: Experimental Partmentioning

confidence: 99%

“…3 Nonetheless, a borohydride reduced nickel coating is harder and has higher wear resistance than tool steel and hard chrome coatings. 4,5 On the other hand, some studies -although they are limited in number -have highlighted the addition of tungsten to this coating system for increasing its corrosion resistance, which is lower than that of a Ni-P coating. [6][7][8][9] As a result of the co-deposition of this refractory material (which cannot be reduced in an aqueous solution as metallic tungsten) together with iron group metals, developing coatings with attractive corrosion and tribological properties is possible.…”

Section: Introductionmentioning

confidence: 99%

Corrosion resistance of as-plated and heat-treated electroless dublex Ni-P/Ni-B-W coatings

Yüksel¹,

Erdoğan²,

Baştan³

et al. 2017

Mater. Tehnol.

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In this study, Ni-P/Ni-B-W dublex coatings were deposited on carbon steel substrates (AISI 1020) using the electroless plating process and their microstructure and corrosion properties were systematically evaluated based on different heat-treatment temperatures. Both, the surface morphology and cross-sectional morphology of the Ni-P/Ni-B-W coatings were studied using a scanning electron microscope (SEM), while X-ray diffraction (XRD) was applied for examining the structural modifications. The amorphous coating began to crystallize at a heat-treatment temperature of 350°C. Potentiodynamic polarization measurements were carried out in an aqueous medium containing 3.5 % NaCl for evaluating the corrosion resistance of as-plated and heat-treated dublex coatings. The corrosion potentials of dublex coatings were observed to shift toward more positive values with increased heat-treatment temperatures. Depending on the heat-treatment temperature, it was identified that the crystallized dublex coatings generally had better corrosion resistance than the amorphous coating. Keywords: Ni-P/Ni-B-W coating, corrosion, heat treatment V {tudiji so bile dvojne Ni-P/Ni-B-W prevleke nane{ene na substrate iz ogljikovega jekla (AISI 1020) s postopkom neelektri~nega platiranja. Sistemati~no so bile ocenjene mikrostruktura ter korozijske lastnosti izdelanih prevlek, glede na razli~ne temperature toplotne obdelave. Morfologije povr{in in profili izdelanih Ni-P/Ni-B-W prevlek so bili pregledani z vrsti~nim elektronskim mikroskopom (SEM), medtem ko so bile z rentgensko difrakcijsko analizo (XRD) ugotovljene strukturne spremembe. Amorfna prevleka je za~ela kristalizirati pri temperaturi toplotne obdelave 350°C. Korozijska odpornost platiranih in toplotno obdelanih dupleks prevlek je bila ocenjena s pomo~jo meritev potenciodinami~ne polarizacije v 3,5 % vodni raztopini NaCl. Opazovali so korozijske potenciale dupleks prevlek, da bi dobili bolj pozitivne vrednosti z zvi{animi temperaturami topolotne obdelave. Ugotovljeno je bilo, da imajo kristalizirane dupleks prevleke na splo{no bolj{o korozijsko odpornost kot amorfne prevleke.

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“…Figure 3 shows part of the DSC heating curve obtained from the FeB-25Ni powders. There is an exothermic peak between 700 K and 873 K, which is considered to correspond to the crystallization of the Ni layer 22) . Figure 4 shows the relation between the apparent relative density and sintering temperature of FeB-25Ni, with those of as-received FeB (hereafter called FeB-0Ni), FeB-10Fe/Ni, and pure Ni powders as references.…”

Section: Characteristics Of the Electroless-plated Ni Layermentioning

confidence: 99%

Consolidation Behaviors of FeB–25Ni Powders in Spark Sintering and Mechanical Properties of Their Compacts

Kang

Choi

et al. 2016

Mater. Trans.

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Electroless Deposition of Nickel-Boron Alloys Mechanism of Process, Structure, and Some Properties of Deposits

Abstract: The conditions for electroless nickel‐boron plating, the process mechanism, and the structure of the alloys as‐plated and after annealing at 150°–700°C were investigated. A correlation of the mechanical and magnetic properties with the changes of phase structure was established.

Cited by 127 publications

References 0 publications

Electrochemical Impedance Spectroscopy of Ni-B Coatings and Optimization by Taguchi Method and Grey Relational Analysis

Electrochemical Impedance Spectroscopy of Ni-B Coatings and Optimization by Taguchi Method and Grey Relational Analysis

Corrosion resistance of as-plated and heat-treated electroless dublex Ni-P/Ni-B-W coatings

Consolidation Behaviors of FeB–25Ni Powders in Spark Sintering and Mechanical Properties of Their Compacts

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