(1. 中國科學(xué)院 金屬研究所 材料環(huán)境腐蝕中心，沈陽 110016；2. 江西科技師范學(xué)院 江西省材料表面工程重點實驗室，南昌 330013)
摘 要: 在自行研制的電解液中，采用四因素三水平正交實驗，系統(tǒng)研究頻率、占空比、電流密度和終電壓對AZ91HP鎂合金氧化膜厚度的影響。結(jié)果表明，各因素的主次順序為終電壓＞電流密度＞占空比＞頻率。終電壓對氧化膜厚度影響顯著，電流密度對氧化膜厚度有影響但不顯著，占空比和頻率對氧化膜厚度無顯著影響。氧化膜層的耐蝕性并不是僅僅由厚度決定，而是由多種因素綜合作用的結(jié)果。
關(guān)鍵字: 鎂合金；微弧氧化；電參數(shù)；厚度
（1. Environmental Corrosion Center, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China ;2. Jiangxi Key Laboratory of Surface Engineering,Jiangxi Science and Technology Normal University, Nanchang 330013, China）
Abstract:The effects of four factors (frequency, duty cycle, current density and final voltage) with three levels on coating thickness formed on AZ91HP magnesium alloys were systematically studied by the orthogonal experiment in a process developed by the authors. The result of intuitionistic analysis showed that the order of affecting coating thickness was ranked as final voltage >current density>duty cycle>frequency. Variance analysis indicated that final voltage and current density separately affected the coating thickness significantly and to a less remarkable extent, but duty cycle and frequency had no obvious effects on it, respectively. The corrosion resistance of anodic coatings was not just determined by their thickness but by the integrated effect resulted from several factors.
Key words: magnesium alloy; micro arc oxidation; electric parameter; thickness
