掺杂白刚玉粉体的钛合金阳极氧化膜性能研究

Titanium Alloy Anodic Oxide Film Doped with White Corundum Powder

在硫酸阳极氧化液中添加白刚玉粉体,研究粉体加入量、阳极氧化电压、氧化液温度等对钛合金硫酸阳极氧化膜耐磨性和耐蚀性的影响。采用非磁性测厚仪测试氧化膜的厚度,采用电化学工作站测试盐水中钛合金阳极氧化膜的阻抗谱,使用RMJ-II型平面磨耗试验机测量氧化膜的耐磨性。研究结果表明:氧化液中粉体含量和阳极氧化电压对耐磨性的影响显著,对氧化膜的膜厚和阻抗影响都不显著;氧化液温度对三个性能影响都不显著;当粉体加入量为40~50 g/L时,钛合金阳极氧化膜的耐磨性能和耐蚀性能均增强;低温高电压进行钛合金阳极氧化可得到高耐磨性能的氧化膜;用高于90℃的蒸馏水进行封孔后,试样的阻抗值极大地提高,即阳极氧化钛合金的耐蚀性增强。

With white corundum powder added to the sulfuric acid anodizing solution the influence of powder addition, anodizing voltage, and temperature of the oxidation solution on the wear resistance and corrosion resistance of the sulfuric acid anodizing film of titanium alloy was studied.A non-magnetic thickness gauge was used to test the thickness of the oxide film, an electrochemical workstation was used to measure the impedance spectrum of the titanium alloy anodic oxide film in salt water, and the RMJ-II plane abrasion tester was used to measure the wear resistance of the oxide film.The research results show that the powder content in the oxidizing solution and the anodic oxidation voltage have significant effects on the wear resistance, and have no significant effect on the film thickness and impedance of the oxide film;the temperature of the oxidizing solution has no significant effect on the three properties.When the amount of powder added is 40~50 g/L,the wear resistance and corrosion resistance of the titanium alloy anodic oxide film are enhanced;titanium alloy anodized at low temperature and high voltage can obtain oxide film with high abrasion resistance.After sealing, the resistance value of the sample was greatly increased, indicating that the sealing improves the corrosion resistance of the anodized titanium alloy.After the hole was sealed with distilled water above 90 ℃,the corrosion resistance of the titanium alloy anodized film was greatly improved.