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铝基表面等离子喷涂Al2O3-TiO2-Ta涂层的制备及防腐性能
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1.广东电网有限责任公司电力科学研究院;2.华南理工大学

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中国南方电网有限责任公司科技项目(项目号GDKJXM00000017),国家自然科学基金资助(项目号51772106)


Preparation and corrosion protection of Al2O3-TiO2-Ta coating on aluminum surface by plasma spraying
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1.Guangdong Power Grid Co,Ltd Electric Power Research Institute;2.South China University of Technology

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    摘要:

    采用等离子喷涂技术在铝基表面构建Al2O3-TiO2涂层和Al2O3-TiO2-Ta涂层。由于钽元素的引入,Al2O3-TiO2-Ta涂层表面形貌更均匀、致密。同时钽金属具有极强的耐酸碱特性,因此,Al2O3-TiO2-Ta涂层相对于Al2O3-TiO2涂层具有更强的耐腐蚀性。Tafel曲线结果显示,Al2O3-TiO2涂层使得基体的腐蚀电位仅正移了99.6 mV,Al2O3-TiO2-Ta涂层使得铝基体腐蚀电位正移了208.9 mV。因此,由于耐蚀性极强的Ta金属的掺入,Al2O3-TiO2涂层的防腐性得到了极大的增强,Al2O3-TiO2-Ta涂层有效地防止铝合金腐蚀。

    Abstract:

    Plasma-sprayed Al2O3-TiO2 and Al2O3-TiO2-Ta coatings were fabricated on aluminum substrates. Due to the introduction of tantalum, Al2O3-TiO2-Ta coating surface morphology is more uniform and compact. At the same time tantalum metal has a very strong acid and alkali resistance, therefore, Al2O3-TiO2-Ta coating relative to the Al2O3-TiO2 coating has a stronger corrosion resistance. The results of Tafel curves show that the corrosion potential of Al2O3-TiO2 coatings shifts the positive corrosion potential by 99.6 mV, and that of Al2O3-TiO2-Ta coatings shifts the corrosion potential of Al by 208.9 mV. Therefore, the corrosion resistance of Al2O3-TiO2 has been greatly enhanced due to the incorporation of Ta metal with high corrosion resistance. The Al2O3-TiO2-Ta coating can effectively prevent the corrosion of the aluminum alloy.

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黄丰,聂铭,周文浩,王珍高,付如民,宁成云.铝基表面等离子喷涂Al2O3-TiO2-Ta涂层的制备及防腐性能[J].稀有金属材料与工程,2019,48(8):2689~2693.[Feng Huang, Ming Nie, Wenhao Zhou, Zhengao Wang, Ruming Fu, Chengyun Ning. Preparation and corrosion protection of Al2O3-TiO2-Ta coating on aluminum surface by plasma spraying[J]. Rare Metal Materials and Engineering,2019,48(8):2689~2693.]
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  • 收稿日期:2018-03-06
  • 最后修改日期:2018-04-04
  • 录用日期:2018-04-26
  • 在线发布日期: 2019-09-05
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