Corrosion resistance behaviour of graphene/polyvinyl alcohol nanocomposite coating for aluminium-2219 alloy
Corrosion resistance behaviour of graphene/polyvinyl alcohol nanocomposite coating for aluminium-2219 alloy
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DOI：
10.1016/j.jallcom.2017.04.324
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发表时间：
2017-09-05
影响因子：
6.2
通讯作者：
Ghosh, Rahul
中科院分区：
文献类型：
--
作者：
Hikku, G. S.;Jeyasubramanian, K.;Ghosh, Rahul
本文详细介绍了石墨烯共混聚乙烯醇（G-PVA）纳米复合材料的制备，并将其作为铝-2219合金的有效耐蚀涂层。采用XRD、FTIR、SEM、EDX、粒度分析仪等对石墨烯、PVA、GPVA复合材料的结构进行表征，采用动电位极化曲线和电化学阻抗分析评价G-PVA复合材料在Al-2219表面的耐蚀性。Al-2219在3.5%NaCl溶液中的腐蚀速率为45.25 × 10（-4）Ω/cm，PVA涂层Al-2219的腐蚀速率已降至2.576 × 10（-4）Ω/cm，GPVA涂层Al-2219的腐蚀速率进一步降至3.853 × 10（-4）Ω/cm。其他参数，如保护效率，腐蚀电流密度，极化电阻等进行了评价，进一步验证了所制备的复合材料的耐腐蚀性的性质。电化学阻抗分析也支持GPVA涂层铝比裸铝显示更好的耐腐蚀性能的事实。（C）2017 Elsevier B. V.版权所有。
This paper details about the preparation of graphene blended polyvinyl alcohol (G-PVA) nanocomposite to be used as an effective corrosion resistance coating for Aluminum-2219 alloy. Structural characterizations of graphene, PVA, GPVA composites were performed using XRD, FTIR, SEM, EDX mapping, Particle size analyzer, etc. Corrosion resistance of G-PVA composite coated on Al-2219 was evaluated using potentiodynamic polarization studies and electrochemical impedance analysis. Al-2219 exhibits a corrosion rate of 45.25 mpy, which has been reduced to 2.576 mpy for PVA coated Al-2219 and further diminished to 3.853 x 10(-4) mpy for GPVA coated Al-2219 in 3.5% NaCl solution. Other parameters such as protective efficiency, corrosion current density, polarization resistance, etc. were evaluated which further validates the corrosion resistance nature of the prepared composite. The electrochemical impedance analysis also supports the fact that the GPVA coated Al displays better corrosion resistant property than the bare Al. (C) 2017 Elsevier B.V. All rights reserved.