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首页> 外文期刊>International Journal of Electrochemical Science >Enhanced Corrosion Resistance of TA2 Titanium via Anodic Oxidation in Mixed Acid System
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Enhanced Corrosion Resistance of TA2 Titanium via Anodic Oxidation in Mixed Acid System

机译：混合酸体系中阳极氧化技术增强TA2钛的耐蚀性

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Anodic oxidation has been successfully used for surface modification of the titanium alloys. TiO2 layers formed by anodization were modified the structure, apatite-forming ability and corrosion resistance of TA2 titanium alloy, in tartaric-sulfuric-oxalic acid system. Effects of different anodizing voltages and duration on the microstructure and performances of titania surface were investigated for anodizing TA2 titanium. The results showed that the TA2 titanium surface was covered with porous anatase and rutile after anodization which the thickness of the oxide layer achieved about 500nm. The corrosion resistance has been largely improved because the corrosion current density (2.044×10- 5A/cm2 and 2.725×10-5A/cm2) decreased a magnitude compared with untreated TA2 titanium (2.725×10-4A/cm2 ), when the TA2 titanium was anodized under the condition of 40V for 40 min. After soaking in SBF, apatite formed on the TiO2 layers and it covered the most parts of the surface when anodized at 40V for 10 min. Also, the EDS results revealed that Ca/P of the apatite films which demonstrated that the TiO2 layers were short of calcium compared to hydroxyapatite.
机译：阳极氧化已成功地用于钛合金的表面改性。在酒石-硫酸-草酸体系中，通过阳极氧化形成的TiO2层改变了TA2钛合金的结构，磷灰石形成能力和耐蚀性。研究了不同的阳极氧化电压和时间对二氧化钛表面钛合金表面组织和性能的影响。结果表明，阳极氧化后TA2钛表面被多孔的锐钛矿和金红石覆盖，氧化层厚度达到约500nm。耐蚀性得到了极大的改善，因为当TA2腐蚀时，腐蚀电流密度（2.044×10-5A / cm2和2.725×10-5A / cm2）与未经处理的TA2钛（2.725×10-4A / cm2）相比减小了一个幅度。钛在40V的条件下阳极氧化40分钟。在SBF中浸泡后，在TiO2层上形成了磷灰石，当在40V下阳极氧化10分钟时，磷灰石覆盖了大部分表面。另外，EDS结果显示磷灰石膜的Ca / P表明与羟基磷灰石相比，TiO 2层缺少钙。

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