医用Mg-Ca合金腐蚀研究进展  

Advancement in in-vitro corrosion of biomedical Mg-Ca alloys

       由于Mg和Ca都是人体中主要的阳离子元素，Mg–Ca 合金医用研究具有应用前景。郑玉峰教授【1】和我们前期【2-5】有关Mg-Ca合金生物医用研究成果已经在Biomaterials、Corrosion Science、Surface and Coatings Technology等知名期刊发表，该项研究似乎是老生常谈了。  

   但至今，有关Ca含量对Mg-Ca腐蚀的影响存在不同说法。比较多的论文报道认为，Ca含量越低，Mg-Ca合金耐蚀性越好。

   该项研究指出，Mg₂Ca与杂质元素Fe、Si共存，形成Mg₂CaFeSi 颗粒，导致Mg-Ca合金发生点蚀和丝状腐蚀。Ca具有双重作用：（1）细化晶粒，增加耐蚀性和（2）形成Mg₂Ca相，导致微电偶腐蚀，降低耐蚀性。两者对立统一的结果是，Ca含量为0.79 wt%的Mg-Ca合金具有最佳的耐蚀性。另外，Mg-0.79Ca合金还具有最高的硬度、抗拉强度和屈服强度。

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Article title: In vitro corrosion of as-extruded Mg-Ca alloys—The influence of Ca concentration
Reference: CS6261
Journal title: Corrosion Science
Corresponding author: Prof. Rong-Chang Zeng
First author: Prof. Rong-Chang Zeng
Final version published online: 14-MAY-2015
Full bibliographic details: Corrosion Science  (2015), pp. 23-31
DOI information: 10.1016/j.corsci.2015.03.018

The following personal article link- http://authors.elsevier.com/a/1R1LY,FwiT65m will provide you a free access, and is valid for 50 days, until July 3, 2015.

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3. Chun-Yan Zhang, Rong-Chang Zeng, Cheng-LongLiu, Jia-Cheng Gao.Comparisonof calcium phosphate coatings on Mg–Al and Mg–Ca alloys and their corrosionbehavior in Hank's solution,Surface and Coatings Technology, 204(21-22) 2010: 3636-3640.

4. Chun-Yan Zhang, Rong-Chang Zeng *, Cheng-Long Liu, Rongshi Chen, Jia-Cheng Gao. Preparation of calcium phosphatecoatings on Mg-1.0Ca alloy, Transactions of Nonferrous Metals Society of China,20, 2010: s655-659.

5. 曾荣昌、郭小龙、刘成龙、崔洪芝、陶武、刘云逸、李博文. 医用Mg-Ca和Mg-Li-Ca合金腐蚀研究，金属学报，2011, 47(11): 1477-1482.