A parametric study on the relationship between NaBH<sub>4</sub>and tribological properties in the nickel-boron electroless depositions

Sürdem, Sedat; Eseroğlu, Cihan; Çıtak, Ramazan

doi:10.1088/2053-1591/ab5beb

Cited by 19 publications

(33 citation statements)

References 36 publications

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“…4,11,20 A similar trend of having the presence of Ni 2 and Ni 3 B phases for coatings heat-treated above 4008C is reported earlier. 21 The presence of a highintensity peak of various phases is the confirmation of amorphous to crystalline structure transformation of all variants of ENB coatings till 5508C. 4,11,22,39 The ENB coatings exhibit some abrupt high-intensity peaks, 10 while the same increased further upon increasing the heat-treatment temperature and NaBH 4 concentration.…”

Section: Coating Characterizationmentioning

confidence: 86%

“…It was also found that the coatings having B content below 4.5% does not crystalline completely. 21 Hence, the rise in intensity peaks may be due to the increase in heat-treatment temperature as well as boron content leading to complete crystallization. The boride phases like Ni 3 B and Ni 2 B were observed to increase with NaBH 4 concentration, 20 while, the coatings heat-treated at 5508C do not contain Ni 2 B peak but the majority of the Ni 3 B peaks can be observed with the Ni phase.…”

Section: Coating Characterizationmentioning

confidence: 99%

“…5,8,10 The boron content of borohydride-reduced ENB coatings was observed to rise with NaBH 4 content which led to the phase transformation of as-deposited coatings from nano-crystalline to amorphous structure. 10,21 The improvement of surface hardness and wear resistance can also be observed with an increase in boron content. 14,[22][23][24] The surface hardness with wear resistance was found to get even better after heat treatment.…”

Section: Introductionmentioning

confidence: 96%

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Effect of heat-treatment temperature and borohydride concentration on corrosion behaviour of ENB coating

Barman

Sahoo

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Electroless Ni-B (ENB) alloy coatings are extensively used due to their good tribological, physical, electrical and mechanical properties. The behaviour of coatings generally depends on the concentration of bath parameters, heat-treatment temperature, as well as heat-treatment duration. The current study was carried out to deposit coatings over steel specimens with various NaBH4 concentrations and heat-treated at various temperatures to study the significance of NaBH4 concentration as well as heat-treatment temperature on corrosion resistance of the Ni-B coatings. Ni-B coatings were heat-treated for an hour at different temperatures for example, 350°C, 450°C and 550°C. Electrochemical impedance spectroscopy (EIS) and Potentiodynamic polarization (PDP) test methods were employed to analyse the corrosion behaviour of the as-deposited as well as heat-treated coatings. The tests were conducted against a corrosive environment consisting of 3.5% NaCl solution. It was observed that the as-deposited coatings with low boron content exhibit a mixture of amorphous and nanocrystalline structures. The same gradually becomes amorphous with the rise in sodium borohydride concentration. The increase in boron content with sodium borohydride concentration in the coating bath led to the transformation of phase structure. This amorphous phase structure of as-deposited coatings further transforms into a crystalline structure upon heat treatment. This crystallinity increases with heat-treatment temperature. The as-deposited coatings show cauliflower-like surface morphology at all concentrations of NaBH4 but the same becomes a coarse-grained structure with clustered aggregates leading to a rough surface. The as-deposited coatings show better corrosion resistance behaviour compared to heat-treated ones, especially at the higher temperature.

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Section: Coating Characterizationmentioning

confidence: 86%

Section: Coating Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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Effect of heat-treatment temperature and borohydride concentration on corrosion behaviour of ENB coating

Barman

Sahoo

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Among electrodeposition, the most popular coatings are Ni-based coatings. In addition Ni element, it is also possible to carry out binary or ternary alloy coatings with the reinforcement of alloying elements such as P, Mo, W, and B [6][7][8][9]. It is possible to produce high performance Ni-Watt (Ni-W) coatings, especially with reinforcing elements such as tungsten, with superior mechanical and physical properties and high melting temperatures.…”

Section: Introductionmentioning

confidence: 99%

Tribological performance of Ni-W/PTFE composite coating via pulse electrodeposition

et al. 2022

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The Ni-W/PTFE co-depositions were successfully prepared on steel via pulse electrodeposition methods. Electrodeposition was perform by dispersing 5-20 g/L PTFE particles from Ni-Watt bath. The surface morphology, phase analyses crstalytallite size, distorsion and hardness of the samples were characterized by SEM, XRD, and Vicker?s microhardness tester. The friction coefficient of the coatings were carried out using CSM microtester. As increasing with the concentration of the PTFE in the solution, the wear resistance properties of theco-depositions were increased. These experimental results determined that the PTFE concentration of 15 g/L in the electrolyte was the optimum content to obtain the best micro-structure and wear performance.

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“…Akımsız kaplama yönteminde kullanılan indirgeyici türü aynı zamanda kaplamanın kimyasal içeriğini de belirlemektedir. Nikel kaplamada indirgeyici olarak hidrazin (Haag et al, 2006), Ni-P kaplamada sodyum hipofosfit (Abdülkadir Akyol et al, 2019), Ni-B kaplamada ise dimetilaminoboran (DURU et al, 2021) veya sodyum borhidrür (Sürdem et al, 2019) kullanılır.…”

Section: Introductionunclassified

Akımsız Ni-P-W Kompozit Kaplamalarda PTFE Konsantrasyonunun Sertlik ve Aşınma Üzerinde Etkisi

Aslan¹,

Duru²

2021

European Journal of Science and Technology

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A parametric study on the relationship between NaBH₄and tribological properties in the nickel-boron electroless depositions

Cited by 19 publications

References 36 publications

Effect of heat-treatment temperature and borohydride concentration on corrosion behaviour of ENB coating

Effect of heat-treatment temperature and borohydride concentration on corrosion behaviour of ENB coating

Tribological performance of Ni-W/PTFE composite coating via pulse electrodeposition

Akımsız Ni-P-W Kompozit Kaplamalarda PTFE Konsantrasyonunun Sertlik ve Aşınma Üzerinde Etkisi

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A parametric study on the relationship between NaBH4and tribological properties in the nickel-boron electroless depositions

Cited by 19 publications

References 36 publications

Effect of heat-treatment temperature and borohydride concentration on corrosion behaviour of ENB coating

Effect of heat-treatment temperature and borohydride concentration on corrosion behaviour of ENB coating

Tribological performance of Ni-W/PTFE composite coating via pulse electrodeposition

Akımsız Ni-P-W Kompozit Kaplamalarda PTFE Konsantrasyonunun Sertlik ve Aşınma Üzerinde Etkisi

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A parametric study on the relationship between NaBH₄and tribological properties in the nickel-boron electroless depositions