2SO4溶液中進(jìn)行不同時(shí)長(zhǎng)的陽(yáng)極氧化處理。使用光學(xué)顯微鏡、X射線(xiàn)衍射、拉曼光譜、光電子能譜及電化學(xué)測(cè)試研究氧化膜的表面特性及腐蝕抗性。結(jié)果表明，梯度納米晶結(jié)構(gòu)可以增加氧化膜的厚度，促進(jìn)結(jié)晶行為，提高抗腐蝕性。陰陽(yáng)離子空位凝聚機(jī)制能夠解釋梯度納米晶結(jié)構(gòu)對(duì)抗腐蝕性的影響。;The surface gradient nanocrystalline structure was fabricated by the surface mechanical attrition treatment (SMAT), and the influence of surface nanocrystallization on the surface microstructure and characteristic of passive film on pure titanium was studied. The anodic oxidation was conducted in 0.5 mol/L H2SO4 solution under the potentiostatic mode at 30 V for different durations to investigate the surface characteristic and corrosion resistance of the passive films by optical microscope, X-ray diffraction, Raman spectrometer, X-ray photoelectron spectroscopy, and electrochemical test. The results show that the gradient nanocrystalline structure can increase the film thickness, promote the crystallization, and improve the corrosion resistance of passive film. The influence mechanism of surface nanocrystallization on the corrosion resistance can be explained by the cation-anion-vacancy condensation."/>