Al2O3 coating fabricated on titanium by cathodic microarc electrodeposition

作者：Jin Qian; Xue Wenbin^*; Li Xijin; Zhu Qingzhen; Wu Xiaoling

来源：Journal of Alloys and Compounds, 2009, 476(1-2): 356-359.

DOI：10.1016/j.jallcom.2008.08.079

• Cathodic microarc electrodeposition
• Titanium
• Al2O3 coating
• Properties

A Al2O3 coating was prepared on titanium substrate by cathodic microarc electrodeposition method in Al(NO3)(3) ethanol solution. The coating thickness was about 80 mu m when a 400V cathodic potential was applied. The morphology and phase constituent of the Al2O3 coating were investigated by scanning electron microscope (SEM) and X-ray diffraction (XRD). The isothermal oxidation at 700 degrees C and electrochemical corrosion behavior of the coated titanium were analyzed. The coating was composed of gamma-Al2O3 and little alpha-Al2O3 phases. The oxidation resistance of the titanium subjected to cathodic microarc treatment was obviously improved. The polarization test indicated that the coated titanium has better corrosion resistance.

• 出版日期2009-5-12
• 单位北京师范大学