Enhanced corrosion and tribocorrosion behavior of Ti6Al4V alloy by auto–sealed micro-arc oxidation layers

In this study, micro porous oxide layer was formed on a Ti6Al4V alloy by the micro arc oxidation process in an electrolyte containing (CH3COO)2CaH2O + Na3PO4 with appropriate amount of silver containing agent. A wide spectrum antibiotic was also applied to the surface. Samples were subjected to antimicrobial activity tests in accordance with JIS Z 2801 standard against E.coli and the results were compared with those of original Ti6Al4V sample. First experimental results presented here showed that the micro arc oxidation process improve the antibacterial activity of Ti6Al4V alloy surface and further improvement could be obtained upon antibiotic application in addition to the micro arc oxidation process.

Download Full-text

Improvement of tribological performance by micro-arc oxidation treatment on selective laser melting Ti6Al4V alloy

Materials Research Express ◽

10.1088/2053-1591/ab2a47 ◽

2019 ◽

Vol 6 (9) ◽

pp. 096509 ◽

Cited By ~ 1

Author(s):

Xingchen Yan ◽

Chaoyue Chen ◽

Rodolphe Bolot ◽

Wenyou Ma ◽

Chunming Deng ◽

...

Keyword(s):

Selective Laser Melting ◽

Tribological Performance ◽

Ti6al4v Alloy ◽

Laser Melting ◽

Oxidation Treatment ◽

Micro Arc Oxidation

Download Full-text

Construction of lubricant composite coating on Ti6Al4V alloy using micro-arc oxidation and grafting hydrophilic polymer

Materials Science and Engineering C ◽

10.1016/j.msec.2018.04.057 ◽

2018 ◽

Vol 90 ◽

pp. 219-226 ◽

Cited By ~ 6

Author(s):

Kun Wang ◽

Dangsheng Xiong

Keyword(s):

Composite Coating ◽

Ti6al4v Alloy ◽

Hydrophilic Polymer ◽

Micro Arc Oxidation

Download Full-text

Effects of Micro-Arc Oxidation of Ti6Al4V Alloy on Adhesion Property to Electroless Ni-P-ZrO2 Composite Platings and Their Wear Resistance

Rare Metal Materials and Engineering ◽

10.1016/s1875-5372(14)60032-1 ◽

2013 ◽

Vol 42 (12) ◽

pp. 2427-2432 ◽

Cited By ~ 5

Author(s):

Feng Changjie ◽

Hu Shuilian ◽

Jiang Yuanfei ◽

Zhou Yan

Keyword(s):

Wear Resistance ◽

Ti6al4v Alloy ◽

Adhesion Property ◽

Micro Arc Oxidation ◽

Electroless Ni

Download Full-text

Characteristics of the Molten Pool Temperature Field and Its Influence on the Preparation of a Composite Coating on a Ti6Al4V Alloy in the Micro-Arc Oxidation Process

Materials ◽

10.3390/ma13020464 ◽

2020 ◽

Vol 13 (2) ◽

pp. 464

Author(s):

Xinyi Li ◽

Chaofang Dong ◽

Qing Zhao ◽

Fasong Cheng

Keyword(s):

Temperature Field ◽

Composite Coating ◽

Molten Pool ◽

Composite Coatings ◽

Secondary Phase ◽

Ti6al4v Alloy ◽

Temperature Phase ◽

Active Period ◽

Long Distance ◽

Micro Arc Oxidation

In this study, the phase transition of secondary phase particles in a composite coating is used to estimate the temperature field of the molten pool on a Ti6Al4V alloy in the micro-arc oxidation (MAO) process. The behavior of the sparks and the molten pool during the MAO process was observed in real-time by a long-distance microscope. The microstructures and compositions of the composite coatings were studied by scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The results revealed that, for the temperature field distribution range of the molten pool in the active period, the lower limit is 2123 K and the upper limit is not lower than 3683 K. The reason for the multiphase coexistence is that the high-temperature phase is retained by the rapid cooling effect of the electrolyte, and the low-temperature phase is formed due to secondary phase transformation during the long active time of the molten pool temperature field. The strengthening mechanism of the composite coating prepared by adding the secondary phase particles is elemental doping rather than particle enhancement. The secondary phase particles are able to enter the composite coating by adhering to the surface during the cooling process. The secondary phase particles will then be wrapped into the coating in the next active period.

Download Full-text

Preparation and Corrosion Behaviour of Micro-Arc Oxidation Coating on Ti6Al4V Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.621.117 ◽

2012 ◽

Vol 621 ◽

pp. 117-120

Author(s):

Xiu Zhou Lin ◽

Min Gong ◽

Zhao Hua Wang ◽

Peng Zhang

Keyword(s):

Corrosion Resistance ◽

Corrosion Potential ◽

Corrosion Behaviour ◽

Salt Spray ◽

Corrosion Current ◽

Ti6al4v Alloy ◽

Oxidation Time ◽

Oxidation Treatment ◽

X Ray ◽

Micro Arc Oxidation

Micro-arc oxidation (MAO) coatings were prepared on Ti6Al4V alloys surface by using self-made micro-arc oxidation equipment. Its characterizations were systematically detected by Vickers hardness tester, scanning electron microscope (SEM), X-ray diffractometer (XRD) and X-ray fluorescence spectrometer (XFS). Corrosion behaviour of MAO coating and Ti6Al4V alloy in Hank's simulated body fluid were studied comparatively using electrochemical workstations and salt spray test chamber. The experimental results indicated that the MAO coating, with rough surface, high hardness and typical porous ceramic structure, is mainly consist of anatase and rutile TiO2 phase. Micro-arc oxidation treatment can significantly improve corrosion resistance of Ti6Al4 alloy, and the corrosion resistance of the coating is observably affected by the coating technology. During the micro-arc oxidation treatment, the thickness of the coating increases with the increase of oxidation time, which induce that the corrosion potential and polarization resistance of the coating increase, and the corrosion current reduce. Simultaneously, the thicker the coating, the higher the pitting resistance is. On the other hand, under the same oxidation time, as the current density increases during micro-arc oxidation treatment, the corrosion potential of the coating positive shifts, and the corrosion current reduces.

Download Full-text