Surface coordination and excellent anticorrosion performance of strontiumapatite nanocomposite

Publication date: 25 December 2019Source: Journal of Industrial and Engineering Chemistry, Volume 80Author(s): Xiu-Rui Liu, Min Miao, Jing-Yu Zhang, Jin-Ku Liu, Xian-Mei Zhang, Xiao-Gang WangAbstractA mass-produced, simple and scalable self-heating-based method for the manufacture of surface coordination strontiumapatite (SP) nanocomposite with excellent corrosion resistance is proposed. The reaction heat released from the formation of SP material increases the solubility of benzotriazole (BTA) which achieves reasonable distribution of system energy. The BTA is firmly adhered on the SP by SrN coordination bond, which acts as barrier impeding on the penetration of the corrosive medium. Scan electron microscopy (SEM) and X-ray diffraction (XRD) were employed to characterize coating morphology and chemical composition. Meanwhile, electrochemical impedance spectroscopy (EIS) data show that the resultant resistance of strontiumapatite/benzotriazole (SPB) nanocomposite coating was 3.02 × 104 Ω cm2, which was improved by 601.8% compared with SP material. The improvement of corrosion performance is attributed to the synergistic anticorrosion mechanism that includes the shielding effect, extension of charge transfer paths and formation of multiple passivation films. The method for organic and inorganic synergistic material provides ideas for the design and synthesis of anticorrosive materials.Graphical abstractThe strontiumapatite/benzotriazole (SPB) nanocomposite was succes...
Source: Journal of Industrial and Engineering Chemistry - Category: Chemistry Source Type: research