Effect of rare earth on microstructure and corrosion behavior of electroless Ni-W-P composite coatings

Abstract

Purpose This paper aims to research the effect of different concentrations for Nd(NO3)3 and Ce(NO3)3 on the microstructures and corrosion resistance of Ni-W-P composite coatings through electroless plating method. Design/methodology/approach Scanning electron microscope, attached energy dispersive spectroscopy system and X-ray diffraction were used in this work. Meanwhile, the immersion test and electrochemical tests were used to characterize the corrosion behavior of the coating. Findings The coatings prepared at 1.00 g·L−1 Nd(NO3)3 exhibit a dense structure and high phosphorus content (12.38 wt.%). In addition, compared to the addition of Ce(NO3)3, when Nd(NO3)3 was introduced at a concentration of 1.00 g·L−1, the minimum corrosion rate of the coating was 1.209 g·m−2·h−1, with a noble Ecorr (−0.29 V) and lower Icorr (8.29 × 10−4 A·cm−2). Originality/value The effects of rare earths on the deposition and corrosion resistance mechanisms of Ni-W-P composite coatings were explored, with the rare earth elements promoting the deposition of nickel and tungsten atoms. Simultaneously, the amorphization of the coating increases, which excellently enhances the corrosion resistance of the coating.

Progress in superhydrophobic surfaces for corrosion protection of Mg alloys – a mini-review

“…Reducing the contact area between the substrate and electrolyte can effectively decrease the corrosion rate of Mg alloy (Li et al , 2023). Some methods, such as chemical conversion (Yang et al , 2022), anode oxidation (Wu et al , 2022a, 2022b), metal plating (Jia et al , 2022) and hydrothermal method (Rahimi et al , 2021), are widely used for Mg alloy protection. In recent years, the superhydrophobic surface (SHPS) has proven to be a promising strategy for enhancing the corrosion resistance of Mg alloy in aqueous environments.…”

Effect of nano-Al2O3 particle addition on Co–P–xAl2O3 nanocomposite plating electroplated on X65 steel

“…The composite plating is prepared by co-depositing metals with insoluble solid particles, inert particles, fibers, etc. (Jia et al , 2022). Among them, the nanocomposite plating prepared by adding nanoscale (less than 100 nm) inorganic particles to the plating has prominent properties so that it was used in a wide range of fields (Fathi et al , 2021; Safavi and Rasooli, 2019).…”

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“…At present, the electrodeposition of Zn–Ni alloy coatings in aqueous solution is a mature technology that is widely used in industrial production (Bahadormanesh et al , 2017; Beheshti et al , 2020. Shekhanov et al , 2020; Abou-Krisha, 2005; Farooq et al , 2022; Roventi et al , 2015; Jia et al , 2022). However, Zn–Ni alloys are usually deposited in alkaline and acidic chloride solutions, and after deposition, the resulting waste liquid is often toxic and corrosive.…”