Duplex Ni-Zn-Cu-P/Ni-P electroless coating on magnesium alloy via maleic acid pretreatment

Heshmati, Mohammad Reza; Seifzadeh, D.; Shoghi, Payam; Gholizadeh-Gheshlaghi, M.

doi:10.1016/j.surfcoat.2017.08.027

Cited by 56 publications

(8 citation statements)

References 61 publications

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“…Unlike electrodeposition method, the autocatalytic reaction of the electroless Ni alloy deposition produces uniform deposits on the substrate surface, and the Co, Cu and P elements dispersed almost uniform distribution across the surface. This element distribution can be confirm using energy dispersive X-ray (EDX) mapping analysis as shown in electroless Ni-Cu-Zn-P [14,15] and Ni-Cu-W-P alloy [4] deposits.…”

Section: Resultsmentioning

confidence: 88%

Effect of heat treatment on the tribological performance of electroless quaternary nickel alloy

Zaimi

Azran

Kasim

et al. 2019

JMES

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Heat treatment of nickel-based alloy can increase the alloy’s hardness as well as the wear resistance properties. Nevertheless, the effect of heat treatment on the quaternary Ni alloy coating properties produced from electroless deposition bath is less known due to its composition uniqueness. In this study, Cu and Co are added in the Ni-P alloy matrix using hypophosphite-based Electroless Ni deposition method on mild steel substrate in acidic and alkaline bath. The coatings are then heat treated at 623 K for 3600s. The coatings hardness is measured using microVickers hardness tester and the surface morphology of the coatings are studied using both Scanning Electron Microscope (SEM) and X-ray diffraction (XRD) analysis. X-ray fluorescence (XRF) measurement is used to measure the coatings compositions. The wear behavior of the coatings is also investigated before and after heat treatment using ASTM G-99. The coatings from acidic-based bath produces Ni-Cu-Co-P alloy coating while the alkaline-based bath produces Ni-Co-Cu-P alloy based on XRF analysis. Results show that the hardness increases more than 20% for acidic-based bath and 40% for alkaline-based bath coating. The highest increment is the Ni-Co-Cu-P alloy, from 553.3 HV to 991.3 HV after heat treatment. The grain refinement of the coatings can be observed after heat treatment in SEM observation. This is proved by the XRD measurement results where polycrystalline Ni (111) formation is seen after heat treatment overshadowing the Cu (111) and Co (111) peaks. Ni phosphide species are also formed after the heat treatment. The polycrystalline Ni and the Ni phosphide formation, as well as the existence of Co and Cu in the alloy deposits reduces the wear rate significantly after the heat treatment.

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Section: Resultsmentioning

confidence: 88%

Effect of heat treatment on the tribological performance of electroless quaternary nickel alloy

Zaimi

Azran

Kasim

et al. 2019

JMES

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“…Coating . According to the theory of galvanic corrosion, galvanic corrosion occurs when dissimilar metals with potential differences are contacted in solution [36]. The results of SVET in 3.5%wt NaCl are shown in figure 8(b), indicating the potential difference gradient in the coating.…”

Section: 24micro Scanning Electrochemicalmentioning

confidence: 99%

Effects of different carbides content and brazing process on the electrochemical behaviour of vacuum brazed WC-10Ni+NiCrBSi coatings

Zhu,

Liu,

Yuan

et al. 2023

Phys. Scr.

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This study prepared a WC-10Ni/NiCrBSi composite coating on Q235 steel employing flexible coating cloth and vacuum brazing technologies. The surface hardness and corrosion resistance of the coating were characterised by the Vickers hardness, electrochemical, and micro-electrochemical tests. The results show that the corrosion resistance of the coating improved with the increase in cladding temperature. Moreover, with the increase in WC-10Ni content, the corrosion resistance of the coating decreased. Through transmission electron microscopy, scanning electron microscopy, and energy dispersive spectroscopy analysis, it is shown that there is galvanic corrosion in the micro-zone corrosion, where the WC particles are protected as cathodes, and the hardness of the coating is not affected by electrochemical behaviour. Thus, the hardness of the coating is not affected when it is applied in a corrosive environment.

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“…Compared to Ni-P coatings, Ni-B coatings have higher hardness and less wear damage and corrosion protection. Researchers have tried Ni-P-Ni-B duplex coatings by using a dual bath to achieve ideal properties [ 161 , 162 , 163 , 164 ]. The resistance to wear and hardness of multilayer Ni-B-Ni-P coatings is lower than Ni-B coating but better than Ni-P coating.…”

Section: Ni-b Ni-p-ni-b Composite Coatingsmentioning

confidence: 99%

Advancements in Nickel-Phosphate/Boron Based Electroless Composite Coatings: A Comprehensive Review of Mechanical Properties and Recent Developments

Chintada,

Gurugubelli,

Tamtam

et al. 2023

Materials

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Nickel-Phosphate/Boron (Ni-P/B) electroless coatings have been widely used to improve physical and mechanical properties in various industrial applications, including the automotive, aerospace, chemical processing, food, oil and gas, electronic, textile, and printing industries. Electroless nickel coatings are one of the most popular surface-coating methods due to their low cost and short processing time. The purpose of this review is to look at several coating materials and the existing processes for making electroless coatings on different materials. The improvement of Ni-P/B composite coatings by the incorporation of secondary particles into an alloy matrix at the macro, micro, and nano levels is explained in detail. Process parameters like type of surfactant, annealing temperature, size of the reinforcement material, and reducing-agent percentage on mechanical characteristics like hardness, high-temperature oxidation behaviour, friction, coefficient, wear, and corrosion have been broadly researched and illustrated clearly.

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Duplex Ni-Zn-Cu-P/Ni-P electroless coating on magnesium alloy via maleic acid pretreatment

Cited by 56 publications

References 61 publications

Effect of heat treatment on the tribological performance of electroless quaternary nickel alloy

Effect of heat treatment on the tribological performance of electroless quaternary nickel alloy

Effects of different carbides content and brazing process on the electrochemical behaviour of vacuum brazed WC-10Ni+NiCrBSi coatings

Advancements in Nickel-Phosphate/Boron Based Electroless Composite Coatings: A Comprehensive Review of Mechanical Properties and Recent Developments

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