Obtaining and Characterizing Ni-P-Sn Coatings  on Steel Support

Radu, Tamara

doi:10.5593/sgem2019/6.1/s24.045

Cited by 3 publications

(3 citation statements)

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“…Radu et al [ 46 ] showed lower values of corrosion current in 3% NaCl solution for coatings received in baths containing Al and Bi. However, this is explained by the Al content in the bath.…”

Section: Resultsmentioning

confidence: 99%

Impact of Bi and Sn on Microstructure and Corrosion Resistance of Zinc Coatings Obtained in Zn-AlNi Bath

2020

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The paper presents results of studies on the impact of bismuth and tin additions to the Zn-AlNi bath on microstructure and corrosion resistance of hot dip galvanizig coatings. The structure at high magnifications on the top surface and cross-section of coatings received in the Zn-AlNiBiSn bath was revealed and the microanalysis EDS (energy dispersion spectroscopy) of chemical composition was determined. The corrosion resistance of the coatings was tested relatively in a neutral salt spray test (NSS), and tests in a humid atmosphere containing SO2. Electrochemical parameters of coatings corrosion were determined. It was found that Zn-AlNiBiSn coatings show lower corrosion resistance in comparison with the coatings received in the Zn-AlNi bath without Sn and Bi alloying additions. Structural research has shown the existence of precipitations of Sn-Bi alloy in the coating. It was found that Sn-Bi precipitations have more electropositive potential in relation to zinc, which promotes the formation of additional corrosion cells.

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Section: Resultsmentioning

confidence: 99%

Impact of Bi and Sn on Microstructure and Corrosion Resistance of Zinc Coatings Obtained in Zn-AlNi Bath

2020

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“…The experimental researches were conducted on layers deposited on steel strips heat treated, Ni-P layers and Ni-P-Al 2 O 3 composite layers, with particles of Al 2 O 3 of 0.3 µm at three different concentrations in the electrolyte bath: 3 g/L, 5 g/L and 8 g/L [5,6].…”

Section: Methodsmentioning

confidence: 99%

Characterization of Ni-P and Ni-P-Al<sub>2</sub>O<sub>3</sub> Heat Treated Layers

Balint

Istrate

2017

AMR

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Research has shown the relationship among hardness, usage and corrosion resistance Ni-P-Al2O3 composite coatings on steel support heat treated. The electroless strips were heat treated at 200°C, 300°C, 400°C, 500°C and 600°C. Further studies on corrosion, hardness and usage revealed changes in properties, compared to the initial state, both on the strips coated with Ni-P and the ones coated with Ni-P-Al2O3 composite. The samples have been studied before and after the heat treatment via Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Energy Dispersive X-ray Analysis (EDX) and X-Ray Diffraction (XRD). The results show that untreated Ni-P layers exhibit strong corrosion resistance, while hardness and usage increase with heat treatment temperature, with a peak at 400 °C. Using suspended particles co-deposition, led to new types of layers, some with excellent hardness and usage properties. Corrosion resistance increase with heat treatment. Coating layers can be adjusted to the desired characteristics, by selecting proper parameters for the expected specific results.

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“…They can be used as metal-anodes of electric batteries, new hybrid materials: foams, metal-matrix composites, thin foils, bimetals [1]. Alloys of the near-eutectic composition Zn-0.2 wt.% Al are used as an anti-corrosion coating for steel plates [2,3].…”

Section: Introductionmentioning

confidence: 99%