Temperature’s Effection to Electroplating Ni-SiC Plating on Aluminum Alloy

Chen, Yan Fang; Chen, Chun Mei; Jie, Ya Fei; Meng, Long; Sheng, Jun Hao

doi:10.4028/www.scientific.net/amr.189-193.351

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“…However, they are readily affected by various types of corrosion, such as intergranular corrosion, stress corrosion cracking, exfoliation, and pitting corrosion (Gerengi et al, 2015). Therefore, surface modification treatments, for example, electroplating (Chen et al, 2011), anodization (Bertram et al, 2014), micro-arc oxidation (Li et al, 2020), and chemical conversion (Twite and Bierwagen, 1998), have been developed to improve the corrosion resistance of Al alloys. Among these methods, the conversion treatment technique is known for its low-cost and operation simplicity.…”

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confidence: 99%

Vanadium and Tannic Acid-Based Composite Conversion Coating for 6063 Aluminum Alloy

et al. 2021

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In this study, a vanadium (V) and tannic acid-based composite conversion coating (VTACC) was prepared on 6063 aluminum alloy (AA6063) to increase its corrosion resistance. The surface morphology and compositions of the VTACCs were characterized using scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), and X-ray photoelectron spectroscopy (XPS). The corrosion resistance of the coatings was investigated by linear polarization and electrochemical impedance spectra (EIS). The self-healing ability of the coating was detected by SEM, EDS, and scanning vibrating electrode technique (SVET) measurements. The coating mainly consisted of metal oxides, including Al2O3, VO2, V2O3, and V2O5, and metal organic complexes (Al and V-complexes). The electrochemical measurement results indicated that the best corrosion resistance of VTACC was acquired when the treatment time was 12 min. Furthermore, because a new coating with vanadium rich oxide was developed on the scratch area, artificial scratch VTACC surfaces were repaired after several days of immersion in 3.5-wt% NaCl solution.

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