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Effect of glycine addition on the in-vitro corrosion behavior of AZ31 magnesium alloy in Hank’s solution

查看全文 作　　者：Durga Bhakta [1,2]Pokharel;Liping [3]Wu;Junhua [1,2]Dong;Amar Prasad [1,4]Yadav;Dhruba Babu [1,2]Subedi;Madhusudan [1,2]Dhakal;Lin [3]Zha;Xin [1]Mu;Aniefiok Joseph [1,2]Umoh;Wei [3]Ke 高影响力作者 机构地区：[1]Shenyang National Laboratory for Materials Science(SYNL),Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016,China;[2]School of Material Science and Engineering,University of Science and Technology of China,Hefei,230026,China;[3]Environmental Corrosion Center,Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016,China;[4]Central Department of Chemistry,Tribhuvan University,Kirtipur,Nepal高影响力机构 出　　处：《Journal of Materials Science & Technology》索引2021年第22期,共11页高影响力期刊 基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.51701221 and 51801219);the National Key Research and Development Program of China(No.2017YFB0702302)。 摘　　要：This study reports on the effect of the addition of Glycine to Hank’s solution on the in-vitro corrosion behavior of AZ31 magnesium(Mg)alloy at 37℃and a pH of 7.4 studied by using potentiodynamic polarization(PDP),hydrogen collecting techniques and electrochemical impedance spectroscopy(EIS)in combination with surface characterization techniques such as optical microscopy(OM),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy analysis(XPS).The results reveal that adsorption of glycine initially subdues the dissolution of AZ31 Mg alloy while in long run it enhances the dissolution of the alloy due to the commencement of the chelation effect of glycine with Ca^(2+) released from hydroxyapatite.The chelation of glycine with Ca^(2+) induces the formation of cracks in the surface film which further promotes the dissolution of AZ31 Mg alloy thereby forming a porous corrosion products layer on the surface of the alloy.As a result,both the continuous dissolution of AZ31 magnesium alloy and the hydrogen evolution rate(HER)are enhanced with increasing the immersion time in Hank’s solution. 关 键 词：AZ31 Mg alloy GLYCINE Hank’s solution EIS Chelating effect
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