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Effect of Initial Orientation on Corrosion Behavior of AZ80 Magnesium Alloy in Simulated Body Fluid
Tao Zhu,Xinghua Gong,Ying Xiong,Xiaxia Hu 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.8
Three diferent orientation specimens (P-ND30, P-ND60 and P-TD) prepared from the rolled AZ80 magnesium alloy plateswere immersed in simulated body fuid (SBF) for 384 h. Electrochemical impedance spectroscopy (EIS) tests were measuredat 24 h, 96 h, 192 h, 288 h, and 384 h during immersion. The corrosion morphology and chemical composition of the threeorientation specimens were investigated using scanning electron microscopy (SEM) and energy dispersive spectroscopy(EDS). X-ray difractometer (XRD) was used to evaluate the phase composition of the surface of the specimen at diferentimmersion stages. The results indicated that the P-ND30 and P-ND60 specimens had similar corrosion behavior. The P-TDspecimen showed the best corrosion resistance. A degradation evolution model was established, and the efect of initialorientation on corrosion behavior was discussed.