Preparation and Corrosion Protection of Al2O3-TiO2-Ta Coating on Aluminum Surface by Plasma Spraying [铝基表面等离子喷涂Al2O3-TiO2-Ta涂层的制备及防腐性能]

作者：Huang F.; Nie M.; Zhou W.; Wang Z.; Fu R.; Ning C.^*

来源：Rare Metal Materials and Engineering, 2019, 48(8): 2689-2693.

• Aluminum alloy
• Corrosion-resistant coating
• Plasma spraying

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 is 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.

• 单位
  华南理工大学