Electrodeposited Ni–Co–B Alloy Coatings: Preparation and Properties

Bekish, Yu. N.; Poznyak, S.K.; Tsybulskaya, L. S.; Gaevskaya, T. V.; Кукареко, В. А.; Mazanik, A.V.

doi:10.1149/2.1151410jes

Cited by 19 publications

(7 citation statements)

References 45 publications

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“…The compounds present in Figure 2 correspond to Ni, Co, and Co 2 B, which is usually reported at 2 Theta = 44 • in literature. The contributions of cobalt and cobalt borides were reported by Campillo and Bekish [20,27]. The presence of cobalt boride is related to increased hardness, which maintains the integrity of the coating/substrate interface.…”

Section: Identification Of the Phases In The Coatingmentioning

confidence: 74%

Comparative Study between NiCoB and IrO2-Ta2O5/Ti Anodes for Application in Impressed Current Cathodic Protection (ICCP)

et al. 2020

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In an impressed current cathodic protection system (ICCP) to protect structures against corrosion, the efficient operation depends on the proper selection of the electrodes, particularly the anode, chosen considering the structure to be protected and the environment in which it is located. The nature and overpotential of the anodic reaction determine the operation costs of an ICCP system so that proper anode selection is critically important for an ICCP system to function efficiently. Commercial anodes based on titanium substrates coated with iridium–tantalum oxide mixtures (IrO2-Ta2O5/Ti) are frequently used for this purpose due to low operating overpotentials. However, the gradual passivation of its surface limits its useful life and increases its operating costs, so it is necessary to seek competitive alternatives for its replacement. This study aimed to determine the feasibility of using carbon steel substrates coated with nickel/cobalt/boron (NiCoB/CS) as a viable low-cost alternative to replace IrO2-Ta2O5/Ti anodes in ICCP systems. Comparison between the electrochemical behavior and the corrosion resistance of both types of electrodes shows that the NiCoB/CS anode shows a good electrocatalytic activity and a higher corrosion resistance than IrO2-Ta2O5/Ti coated anodes, indicating that the NiCoB/CS anodes are promising low-cost candidates for ICCP systems.

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Section: Identification Of the Phases In The Coatingmentioning

confidence: 74%

Comparative Study between NiCoB and IrO2-Ta2O5/Ti Anodes for Application in Impressed Current Cathodic Protection (ICCP)

et al. 2020

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“…В связи с этим перспективным является создание покрытий из АС на конструкционных материалах для придания прочности, твердости и коррозионной стойкости их поверхности [1]. Аморфные покрытия наносятся с использованием ряда технологий, таких как магнетронное напыление [2], электролитическое осаждение [3], газопламенное напыление [4,5], лазерная наплавка [6] и электроискровое легирование (ЭИЛ) [7].…”

Section: Introductionunclassified

Deposition of amorphous hardening coatings by electrospark treatment in a crystalline granule mixture

Бурков

Krutikova²

2019

Izv. VUZ. Poroshk. Met.

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The article focuses on the preparation of amorphous coatings on the Steel 1035 surface by electric spark treat the coating composition control by changing the granule mixture composition was studied. EDS analysis showed that the coatings obtained contain W, Mo, Co and Ni in different ratios. The weight of granules having different compositions decreased by 11–16 wt.% in 6 hours of treatment as a result of electric erosion. The mass transfer coefficient varied from 33 to 54 %. X-ray diffraction analysis showed the predominance of the amorphous phase in the composition of layers deposited. Annealing of the coatings at 1150 °C led to amorphous phase crystallization into M23(C,B)6 type borocarbide and α-Fe. The coatings had an increased microhardness of 10–15 GPa, and their wear resistance under dry sliding wear conditions at 10 and 50 N loads was 3,3 and 1,6 times higher, respectively, than in Steel 1035. The highest values at both loads were shown by samples without nickel, while samples without tungsten featured the lowest values. The coatings had a friction coefficient within 0,27–0,31 that is lower than for Steel 1035 by 13–30 %. Wear resistance of the coatings under dry abrasive wear conditions at the 25 N load was 3 to 5 times higher as compared to uncoated Steel 1035. Samples without nickel demonstrated the best performance, while samples without cobalt had the worst indicators. Thus, it was shown that tungsten and cobalt increase wear resistance of iron-based amorphous alloys, while nickel and molybdenum tend to worsen their tribotechnical behavior.

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“…It has been reported that Co-Ni coatings display high adhesion, heat-conductivity, thermal stability, corrosion resistance, mechanical, chemical and also superior magnetic properties [3][4][5]. Co-Ni coatings could be used as soft magnetic materials and shape memory alloys [6].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Structural and Magnetic Properties of the Cobalt-Nickel Alloys Fabricated in Various Electrolyte Solutions

2017

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Cobalt-Nickel alloys have been widely used for decoration, in magnetic recording devices and corrosion resistance applications, etc. In this study, the influences of cobalt amount in electrolyte on the magnetic and structural properties of the electrodeposited Co-Ni alloys were investigated. An electrolyte solution, consisting of cobalt sulfate, nickel sulfate, nickel chloride and boric acid, was used in electrodeposition. The electrochemical investigation of Co-Ni alloys was completed using cyclic voltammetry and galvanostatic studies. The morphological and structural analyses of the alloys were performed using inductively coupled plasma, scanning electron microscopy, X-ray diffraction and vibrating sample magnetometer techniques. The effect of cobalt concentration on the magnetic properties, phase structure and grain size of the alloys was investigated. Magnetic hysteresis results indicate that the amount of the cobalt content in the electrolyte has a strong influence on the ferromagnetic behavior of fabricated alloys. Results of the study show that changing the electrodeposition parameters, such as composition of electrolyte solution, allows to fabricate alloys with different properties.

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Electrodeposited Ni–Co–B Alloy Coatings: Preparation and Properties

Cited by 19 publications

References 45 publications

Comparative Study between NiCoB and IrO2-Ta2O5/Ti Anodes for Application in Impressed Current Cathodic Protection (ICCP)

Comparative Study between NiCoB and IrO2-Ta2O5/Ti Anodes for Application in Impressed Current Cathodic Protection (ICCP)

Deposition of amorphous hardening coatings by electrospark treatment in a crystalline granule mixture

Investigation of the Structural and Magnetic Properties of the Cobalt-Nickel Alloys Fabricated in Various Electrolyte Solutions

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