Effect of Process Parameters on Deposition Rate of Electroless Ni-P Plating on AZ91D Magnesium Alloy

Wang, Hui Long; Liu, Ling Yun; Jiang, Wen Feng

doi:10.4028/www.scientific.net/amr.418-420.936

Cited by 2 publications

(1 citation statement)

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“…Following that, the adhesion between the coating and the substrate was measured by scratch method and the relationship between substrate surface roughness, modified fiber, and the adhesion was explored [23]. In addition, in order to ensure the efficiency of electroless deposition, the deposition rate of Ni-P alloy was also investigated [24][25][26]. Experimental research was conducted to investigate the effects of bath composition, pH level, and temperature on the deposition rate of Ni-P alloy.…”

Section: Introductionmentioning

confidence: 99%

Study on Adhesion Properties and Process Parameters of Electroless Deposited Ni-P Alloy for PEEK and Its Modified Materials

Gao

Yang

et al. 2023

Coatings

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Polyetheretherketone (PEEK) and its fiber-reinforced materials are thermoplastic polymer materials with broad application prospects. Depositing Ni-P alloy on them can improve their poor conductivity and electromagnetic shielding performance, and further expand their application field. The application effect of the plated parts is significantly impacted by the bonding strength between PEEK and coating. The bonding strength between non-metallic substrate and coating is largely influenced by the surface characteristics of the substrate. Therefore, it is significant to study how the surface roughness of PEEK materials and the modified fibers in materials affect the adhesion of the coating. In this study, Ni-P alloy was electroless deposited on PEEK, 30% carbon-fiber-reinforced PEEK (CF30/PEEK), and 30% glass-fiber-reinforced PEEK (GF30/PEEK) with varying surface roughness. The influence of surface roughness and modified fibers on the coating adhesion was studied. Additionally, the effect of the concentrations of nickel sulfate, sodium hypophosphite, pH, and temperature on the deposition rate of the coating was investigated for the three materials. Based on the highest deposition rate, the process parameters were then optimized. The results demonstrated that as surface roughness increased, adhesion between substrate and coating first increased and then decreased. The surface roughness Ra of 0.4 μm produced the highest coating adhesion. Additionally, fiber-reinforced PEEK adhered to coatings more effectively than PEEK did. The mechanism of the difference in bonding strength between different PEEK-modified materials and coatings was revealed. The optimal process parameters were: nickel sulfate: 25 g/L, sodium hypophosphite: 30 g/L, pH: 5.0, and temperature: 70 °C.

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