Influence of SiO 2 nanoparticles on hardness and corrosion resistance of electroless Ni–P coatings

Islam, Mohammad; Azhar, Muhammad Rizwan; Fredj, N.; Burleigh, Thomas D.; Oloyede, Olamilekan R.; Almajid, Abdulhakim A.; Shah, S. İsmat

doi:10.1016/j.surfcoat.2014.11.044

Cited by 92 publications

(29 citation statements)

References 31 publications

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“…Aluminum alloy substrate corrodes fastest in the electrolyte among all the cladding samples, indicating the Ni‐Co‐P/TiN nanocomposite coating can improve the electrochemical corrosion resistance. In addition, some research holds the view that the coating with nanoparticles can reduce nucleation, which is beneficial to enhance the corrosion resistance of the cladding materials . As presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

Effects of cobalt content on mechanical and corrosion properties of electroless Ni‐Co‐P/TiN nanocomposite coatings

Shi

Fang

et al. 2016

Materials & Corrosion

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Ternary Ni‐Co‐P/TiN (20 nm) nanocomposite coatings with Co content in the range of 0–23 wt% were successfully co‐deposited on Al alloys by electroless plating. The morphology, composition, microstructure, micro‐hardness, wear behavior, and corrosion properties of the coatings were tested using SEM, EDS, XRD, Vickers hardness, ball‐on‐disc wear tester, and electrochemical workstation, respectively. The effect of Co content on the tribological and corrosion properties of Ni‐Co‐P/TiN coatings was studied. It is found that all the coatings have a compact and rough granular structure with sub‐micro globules non‐uniformly distributed on the surface. The grain size and the content of Ni and P decrease, but the micro‐hardness, adhesion force, friction coefficient, and corrosion resistance correspondingly enhance with the increase of Co content in Ni‐Co‐P/TiN coatings. The improved corrosion resistance of Ni‐Co‐P/TiN coating is due to the passivation behavior and small grain caused by the introduction of Co. Based on the excellent properties on the wear and corrosion resistance, ternary Ni‐Co23‐P/TiN coating with high Co content, may be applied as an optimum protective coating for Al alloys.

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Section: Resultsmentioning

confidence: 99%

Effects of cobalt content on mechanical and corrosion properties of electroless Ni‐Co‐P/TiN nanocomposite coatings

Shi

Fang

et al. 2016

Materials & Corrosion

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“…İlave edilen parçacık cinsi bu parametrelerin en önemlileri arasındadır. Birçok çalışmada SiC [7,8], SiO 2 [9,10], TiO 2 [11,12], Al 2 O 3 [13,14] ve h-BN [15][16][17][18][19][20] gibi parçacıkların akımsız nikel kaplamalara etkileri incelenmiştir. Al 2 O 3 , B 4 C, WC, SiC ve SiO 2 gibi sert parçacıkların, kaplamaların sertlik ve aşınma direncini arttırdığı, politetrafloroetilen (PTFE), grafit, karbon nanotüp ve MoS 2 gibi katı yağlayıcı parçacıkların, kaplamaların kendini yağlama özelliğini geliştiği belirlenmiştir [21].…”

Section: Heat Treatment Effect Of Hexagonal Boron Nitride Reinforced unclassified

Heat Treatment Effect of Hexagonal Boron Nitride Reinforced Electroless Nickel Coatings

2019

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ÖZETBu çalışmada, 1050 alüminyum alaşım yüzeyine hekzagonal bor nitrür (h-BN) ilaveli akımsız nikel-fosfor (Ni-P) kompozit kaplama uygulanmış ve 400°C'de 1 saat süreyle yapılan ısıl işlemin kaplama yapısına etkisi incelenmiştir. Kompozit kaplamalar, üç farklı miktarda (1, 5 ve 10 g/L) h-BN içeren çözeltide yapılmıştır. Kaplamalara, Taramalı Elektron Mikroskobu (SEM), X-ışını spektroskopisi (EDS), X-ışını kırınımı (XRD) analizleri yapılmıştır. Bunlara ilaveten yüzey pürüzlülükleri, sertlikleri ölçülmüş ve %3,5 sodyum klorür (NaCl) çözeltisi içinde elektrokimyasal korozyon deneyleri yapılmıştır. Amorf yapıdaki nikel matrisin ısıl işlem ile kristalin yapıya dönüştüğü tespit edilmiştir. Isıl işlem sonucu sertlik değerleri artmış ve en yüksek sertlik değerine (1015 ± 41 HV 0,05 ), 10 g/L h-BN içerikli çözeltide yapılan kaplamada ulaşılmıştır. Elektrokimyasal deneylerde ise ısıl işlemin kompozit kaplamaların korozyon direncini azalttığı belirlenmiştir. ABSTRACTIn this study, surfaces of 1050 aluminium alloy were coated with hexagonal boron nitride (h-BN) reinforced electroless nickel-phosphorus (Ni-P) composite coating and the effect of heat treatment on the coating structure for 1 hour at 400°C was investigated. Composite coatings were performed in solutions which consist of three different compositions (1, 5 and 10 g/L) of h-BN. A scanning electron microscope (SEM), X-ray spectroscopy (EDS) and X-ray diffraction (XRD) analysis were performed on the composite coatings. Additionally, surface roughness and hardness were measured and finally, electrochemical corrosion experiments were conducted in 3.5% sodium chloride (NaCl) solution. The heat treatment process has identified a transition from the amorphous structure to crystalline in the nickel matrix. The result of heat treatment, hardness values increased and the highest value of hardness (1015 ± 41 HV 0.05 ) was achieved with the specimen coated in 10 g/L h-BN solution. In the electrochemical experiments, a reduction in corrosion resistance of the composite coatings was determined as a result of heat treatment.

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“…47 Moreover, many studies have also revealed that this nanocomposite coating obtained by the controlled addition of nanoparticles into the treatment bath possesses less porosity than that of the conventional coatings, resulting in enhanced corrosion resistance. 28,39,41,42,45,51 Medium carbon steel…”

Section: Electroless Platingmentioning

confidence: 99%

A review on the application of inorganic nanoparticles in chemical surface coatings on metallic substrates

et al. 2017

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Influence of SiO 2 nanoparticles on hardness and corrosion resistance of electroless Ni–P coatings

Cited by 92 publications

References 31 publications

Effects of cobalt content on mechanical and corrosion properties of electroless Ni‐Co‐P/TiN nanocomposite coatings

Effects of cobalt content on mechanical and corrosion properties of electroless Ni‐Co‐P/TiN nanocomposite coatings

Heat Treatment Effect of Hexagonal Boron Nitride Reinforced Electroless Nickel Coatings

A review on the application of inorganic nanoparticles in chemical surface coatings on metallic substrates

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