ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Preparation, Characterization and Fatigue Performance of Anodic Oxide Film on Titanium Alloy TC18 in Sodium Tartrate Electrolyte
Received date: 2013-06-03
Revised date: 2013-07-23
Online published: 2013-08-08
Anodic oxide of titanium alloy TC18 in the film-forming agent of sodium tartrate, a new environmentally friendly electrolyte system without hydrofluoric acid, is investigated and the anodic oxide films are successfully prepared. Morphology and phase structure are studied using scanning electron microscopy and Raman spectrometer. Corrosion resistance of TC18 titanium alloy after anodizing is investigated by adopting electrochemical method. The behaviors of high frequency fatigue are tested on the universal high frequency fatigue testing machine. The results show that films has the surface morphology of ravines and bulge. Amorphous TiO2, anatase phase and rutile phase exist in that films, and brookite phase may also exist in that films. After anodic oxidation, the corrosion resistance of TC18 titanium alloy is significantly improved. Compared to the traditional anodic oxidation in sulfuric acid-phosphoric acid, anodic oxidation in sodium tartrate does not decrease the tensile performance and fatigue performance of TC18 titanium alloy, which means that tensile performance and fatigue performance is well improved.
Key words： sodium tartrate; titanium alloys; anodic oxide film; titanium dioxide; fatigue
LIU Jianhua , YANG Kang , YU Mei , LI Songmei , WU Liang , YU Xiumei . Preparation, Characterization and Fatigue Performance of Anodic Oxide Film on Titanium Alloy TC18 in Sodium Tartrate Electrolyte[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(3) : 902 -910 . DOI: 10.7527/S1000-6893.2013.0351
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