(1. 江西科技師范大學(xué) 材料與機電學(xué)院，南昌 330013；
2. 江西出入境檢驗檢疫局 綜合技術(shù)中心，南昌 330013；
3. 江西科技師范大學(xué) 江西省材料表面工程重點實驗室，南昌 330013)
摘 要: 在含15 g/L食品添加劑植酸的基本溶液中，分別加入乙酸鈣、氧化鈣、磷酸二氫鈣、甘油磷酸鈣、EDTA-Ca 5種鈣鹽以及氫氧化鉀，研究鈣鹽種類和氫氧化鉀濃度對鈦合金微弧氧化膜表面形貌及成分的影響。采用掃描電子顯微鏡(SEM)、X射線能譜儀(EDS)、X射線衍射儀(XRD)和傅里葉紅外光譜儀(FT-IR)表征氧化膜的表面形貌、成分和結(jié)構(gòu)。結(jié)果表明：鈣鹽能顯著提高氧化膜中磷含量，且氧化鈣、磷酸二氫鈣和EDTA-Ca能較大程度地提高氧化膜中的鈣含量；氫氧化鉀濃度越高，氧化膜中的鈣含量越高。鈣鹽和氫氧化鉀均能增大氧化膜表面的微孔直徑。
關(guān)鍵字: 鈦合金；微弧氧化；電解質(zhì)；鈣鹽；氫氧化鉀
（1. School of Materials and Electromechanics, Jiangxi Science and Technology Normal University,
Nanchang 330013, China;
2. Comprehensive Technology Center, Jiangxi Entry-Exit Inspection and Quarantine Bureau, Nanchang 330013, China;
3. Jiangxi Key Laboratory of Surface Engineering, Jiangxi Science and Technology Normal University,
Nanchang 330013, China）
Abstract:Five kinds of calcium salts, such as Ca(CH3COO)2, CaO, Ca(H2PO4)2, C3H7CaO6P, EDTA-Ca and KOH, were separately added into a base solution of 15 g/L as food additive phytic acid. The effects of calcium salts and KOH concentrations on the surface morphology and chemical composition of micro arc oxidation coatings formed on titanium alloys were studied. The surface morphology, chemical compositions and phase structures were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffractometry (XRD). The results show that calcium slats can significantly increase the phosphorus content of anodic coatings. In addition, CaO, Ca(H2PO4)2 and EDTA-Ca can greatly improve the calcium content of anodic coatings. With the increase of KOH concentration, the calcium content of the oxide film increases. Both calcium slats and KOH can significantly increase the surface pore diameter of the oxide film.
Key words: titanium alloys; micro arc oxidation; electrolyte; calcium salt; KOH
