Construction of superhydrophobic film on the titanium alloy welded joint and its corrosion resistance study

Abstract

Purpose This study aims to improve the corrosion resistance of TA2-welded joints by superhydrophobic surface modification using micro-arc oxidation technology and low surface energy substance modification. Design/methodology/approach The microstructure and chemical state of the superhydrophobic film layer were analyzed using scanning electron microscopy, energy dispersive X-ray spectroscopy, three-dimensional morphology, X-ray diffraction, X-ray photoelectron spectroscopy and Fourier transform infrared absorption spectroscopy. The influence of the superhydrophobic film layer on the corrosion resistance of TA2-welded joints was investigated using classical electrochemical testing methods. Findings The characterization results showed that the super hydrophobic TiO2 ceramic membrane was successfully constructed on the surface of the TA2-welded joint, and the construction of the super hydrophobic film greatly improved the corrosion resistance of the TA2-welded joint. Originality/value The superhydrophobic TiO2 ceramic membrane has excellent corrosion resistance. The micro nanostructure in the superhydrophobic film can intercept air to form an air layer to prevent the corrosion medium from contacting the surface, thus, improving the corrosion resistance of the sample.

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

“…Li et al (2022) studied the effect of saccharin on the nucleation/growth kinetics of Co–P plating, revealing that the addition of saccharin can refine the grains and improve the corrosion resistance of the plating by transforming the nucleation/growth kinetics from progressive to instantaneous. Naturally inert nano-Al 2 O 3 particles are widely used as secondary phase-reinforced inorganic particles due to low cost, high hardness, excellent wear resistance and oxidation resistance (Salehi Doolabi et al , 2014; Torabinejad et al , 2017; Zhang et al , 2023). However, Co–P–Al 2 O 3 nanocomposite plating has not received much attention.…”