Development of electroless Ni–P/nano-WC composite coatings and investigation on its properties

Luo, Hong; Leitch, Michael; Behnamian, Yashar; Ma, Yongsheng; Zeng, Hongbo; Luo, Jing‐Li

doi:10.1016/j.surfcoat.2015.07.011

Cited by 134 publications

(36 citation statements)

References 38 publications

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“…For the Fig. 10(b), the value of |Z| for Ni-P/Ni-P and Ni-P-12.5mL/L TiO 2 /Ni-P coatings at a fixed frequency of 0.01Hz, which usually corresponds to the polarization resistance of the duplex coatings is much larger than the single Ni-P coating 22 . This can be confirmed that the corrosion resistance of Ni-P coating in the NaCl solution is lower than that of duplex Ni-P/Ni-P and Ni-P-12.5mL/L TiO 2 /Ni-P coatings.…”

Section: Eismentioning

confidence: 99%

Microstructure and Properties of Duplex Ni-P-TiO2/Ni-P Nanocomposite Coatings

et al. 2019

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Duplex NiP -TiO 2 /Ni-P coatings were electrodeposited onto brass substrates. High phosphorus NiP coatings were plated as the inner layer to improve the corrosion resistance, while low phosphorus sol-enhanced NiP -TiO 2 coatings were deposited on the top to strengthen the mechanical property. The microstructure, morphology, mechanical property and corrosion resistance of coatings were investigated systematically. The results show that duplex coatings exhibit both excellent mechanical property and good corrosion resistance. The hardness was further improved from ~545 HV 50 of duplex Ni-P/Ni-P coating to ~622 HV 50 of duplex NiP -12.5mL/L TiO 2 /Ni-P coating, while the hardness of single NiP coating was only ~387 HV 50. The corrosion resistance of duplex coatings improved significantly by adding a suitable amount of TiO 2 sol. Duplex NiP -12.5mL/L TiO 2 /Ni-P coating presented the highest corrosion resistance. However, adding excessive quantities of sol (more than 12.5mL/L) caused nanoparticle agglomeration and created a porous structure in the outer layer, deteriorating the properties of coatings.

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Section: Eismentioning

confidence: 99%

Microstructure and Properties of Duplex Ni-P-TiO2/Ni-P Nanocomposite Coatings

et al. 2019

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“…The above parallel connection was connected with R pf in series because corrosion occurred at the bottom of the perforation of the passive film. R p , a polarization resistance, can be achieved by the sum of the coating‐relevant resistances ( R pf and R ct in this study) in the equivalent circuit . Normally, a high R p means a high resistance to block charge transfer involved in corrosion reaction, and implies a high corrosion resistance of materials.…”

Section: Resultsmentioning

confidence: 99%

A study on preparation and corrosion behavior of nano rare earth oxide‐modified chromized coatings

Wang

Tang

Pei

et al. 2019

Materials & Corrosion

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The corrosion resistance of carbon steel in a harsh environment was improved by preparing a chromized coating on the surface through the method of pack cementation. Nano rare earth‐oxides (NREOs), Y2O3, CeO2, and La2O3 were added to the pack and to further enhance the performance of the chromized coatings. Morphological results showed that NREO refined the microstructure of chromized coatings by retarding the growth of grains. The Mott–Schottky plots demonstrated that coating Cr–La2O3 displayed fewer defects than the other two composite coatings, which was beneficial to reduce the corrosion tendency. In addition, the potentiodynamic polarization and impedance spectroscopy analysis showed that the order of the corrosion rates of the achieved coatings was pure Cr > Cr–Y2O3 > Cr–CeO2 > Cr–La2O3, which revealed that the corrosion resistance increased accordingly.

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“…Moreover, composite films have a higher resistance against the diffusion of Cu [165]. The particles could be categorized based on their type and properties as metallic particles (such as Ag [164,[166][167][168], Al [169,170], Bi [171], and Ti [172] [123,189], CeO 2 [190], TiN [191,192], Si 3 N 4 [193][194][195], TiCN [196], TiC [163,197], WC [198,199], SiC [200][201][202][203][204][205][206][207][208] [218]). hBN [134,210,211], carbon nano-tubes (CNTs) [180,207,[219][220][221], graphite [222,223], and PTFE [217,[224][225][226][227]…”

Section: Deposition Of Ni Compositesmentioning

confidence: 99%