Tribocorrosion behavior and mechanism of micro-arc oxidation Ca/P coating on nanocrystallized magnesium alloys
文献类型： 外文期刊
作者： Yang, Jinghua 2 ; Gu, Yanhong 3 ; Zhou, Xiaomao 1 ; Zhang, Yuping 2 ;
作者机构： 1.Hunan Agr Univ, Pesticide Res Inst, Agr Rd 1, Changsha 410128, Hunan, Peoples R China
2.Henan Inst Sci & Technol, Xinxiang 453003, Peoples R China
3.Beijing Inst Petrochem Technol, Sch Mech Engn, Beijing 102617, Peoples R China
4.Hunan Acad Agr Sci, Changsha 410128, Hunan, Peoples R China
关键词： tribocorrosion; magnesium alloys; nano; micro-arc oxidation
期刊名称：MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION （ 影响因子：2.097； 五年影响因子：1.908 ）
ISSN： 0947-5117
年卷期： 2018 年 69 卷 6 期
页码：
收录情况： SCI
摘要： In order to improve the corrosion and tribocorrosion resistance of magnesium alloy used as implant materials in human body, a calcium phosphate (Ca/P) containing coating was obtained by micro-arc oxidation (MAO) on the nano-layer pretreated by ultrasonic cold forging technology (UCFT). The metallographic structure of the UCFT-treated sample was observed by metallographic microscope. The thickness of the nanolayer is about 100 mu m and the grain size has become smaller than that of the untreated sample. The results show that OCP increases gradually under corrosion and will be up and down under tribocorrosion. PDP data show that the current density of UCFT-MAO sample is the lowest under corrosion and tribocorrosion, and the current density of the sample under tribocorrosion is higher than that under corrosion. EIS shows that the impedance magnitude (|Z|) of the samples under tribocorrosion is much lower than that of under corrosion. These results indicate that corrosion resistant performance of the UCFT-MAO sample can be reduced by wear. And a physical model of the tribocorrosion behavior was proposed.
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