(1. 江西科技師范大學(xué) 材料與機(jī)電學(xué)院，南昌 330013；
2. 湖南科技大學(xué) 機(jī)電工程學(xué)院，湘潭 411201；
3. 浙江盾安輕合金科技有限公司，諸暨 311835)
摘 要: 在含植酸鈉和碳酸鈣的堿性溶液中，采用微弧氧化技術(shù)在Mg-1.0Ca合金表面制備鈣磷鹽涂層。采用掃描電鏡、能譜儀和X射線衍射儀分析氧化膜的表面形貌、成分和相組成；通過析氫試驗、表面觀察法以及浸泡腐蝕失重法分析比較鎂鈣合金氧化前后在模擬體液中的腐蝕降解行為。結(jié)果表明：微弧氧化能顯著降低Mg-1.0Ca合金的腐蝕降解速率；浸泡后氧化試樣表面鈣含量明顯增加，表明氧化膜具有很好的生物活性。
關(guān)鍵字: 鎂鈣合金；微弧氧化；鈣磷涂層；腐蝕降解
（1. School of Materials and Electromechanics,
Jiangxi Science and Technology Normal University, Nanchang 330013, China;
2. College of Electromechanical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;
3. Zhejiang Dunan Light Alloy Technology Co., Ltd., Zhuji 311835, China）
Abstract:The calcium phosphate coatings were prepared by micro arc oxidation (MAO) technique on Mg-1.0Ca alloys in an alkaline solution containing sodium phytate and calcium carbonate. The surface morphology, chemical compositions and phase structure were characterized by scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and X-ray diffractometry (XRD). The corrosion degradation behavior of Mg-1.0Ca alloys before and after MAO treatment in a simulated body fluid (SBF) were compared through the hydrogen evolution test, surface observation method and immersion corrosion weight loss method. The results demonstrate that MAO treatment can significantly reduce the corrosion degradation rate of Mg-1.0Ca alloys. After immersion in SBF, the calcium content of the MAO samples increases significantly, indicating that the obtained micro arc coatings achieve excellent bioactivity.
Key words: Mg-Ca alloy; micro arc oxidation; calcium phosphate coating; corrosion degradation
