Influence of solution temperature on corrosion resistance of Zn-Ca phosphate conversion coating on biomedical Mg-Li-Ca alloys

被引：68

作者：

Zeng, Rong-chang ^{[1
,2
]}

Sun, Xin-xin ^{[1
]}

Song, Ying-wei ^{[2
]}

Zhang, Fen ^{[1
]}

Li, Shuo-qi ^{[1
]}

Cui, Hong-zhi ^{[1
]}

Han, En-hou ^{[2
]}

机构：

[1] Shandong Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266590, Peoples R China

[2] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2013年 / 23卷 / 11期

基金：

中国国家自然科学基金;

关键词：

magnesium alloy; lithium; calcium; phosphate conversion coating; corrosion; biomaterial; IN-VIVO CORROSION; MAGNESIUM ALLOYS; ZINC PHOSPHATE; AZ31; FILM; OXIDATION; BEHAVIOR; VITRO; AL;

D O I：

10.1016/S1003-6326(13)62866-6

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The influence of phosphating bath at different temperatures on the formation and corrosion property of calcium-modified zinc phosphate conversion coating (Zn-Ca-P coating) on Mg-Li-Ca alloy was investigated. The morphologies, elemental distribution and chemical structures of the coatings were examined via SEM, EPMA, EDS, XRD and FT-IR. The corrosion resistance was assessed by hydrogen evolution, potentiodynamic polarization and EIS. The results show that the coating is composed of single element Zn and ZnO at below 45 degrees C; whereas the coatings are predominantly characterized by Zn-3(PO4)(2)center dot 4H(2)O and small amount of element zinc and ZnO at above 50 degrees C. Mg-Li-Ca alloy with Zn-Ca-P coatings prepared at 55 degrees C has the highest corrosion resistance. However, the hydrogen evolution rates of the coatings obtained at 40-50 degrees C is accelerated due to the galvanic corrosion between the imperfection of the single element Zn coating and the Mg substrate.

引用

页码：3293 / 3299

页数：7

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