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利用极化曲线及电化学阻抗谱,并结合扫描电镜、原子力显微镜、电子探针显微镜及红外光谱技术研究氧化处理对镁钙合金表面贻贝类吸附蛋白膜层抗蚀性能的影响.结果表明,在Na IO4氧化作用下,镁钙合金表面的贻贝吸附蛋白膜层由孔状结构转变为网状结构,且趋于均匀致密;未氧化处理的蛋白膜层对镁钙合金的保护作用随时间逐渐增加,而氧化处理的蛋白膜层使镁钙合金的点蚀电位正移,3 d时其腐蚀保护性能达到最佳,浸泡时间延长,膜层的防护性能略有下降.
The polarization curves and electrochemical impedance spectroscopy (EIS) were used to investigate the effect of oxidation treatment on the corrosion resistance of mussel adsorbed protein film on magnesium-calcium alloy by scanning electron microscopy, atomic force microscopy, electron probe microscopy and infrared spectroscopy. Under Na IO 4 oxidation, the mussel adsorption protein membrane on the surface of Mg-Ca alloy changed from pore structure to network structure, and tended to be uniform and compact. The protective effect of unoxidized protein film on Mg-Ca alloy changed with time While the oxidation treated protein film shifted the pitting potential of Mg-Ca alloy positively. After 3 days, the corrosion protection performance reached the best, soaking time prolonged, and the protective performance of the coating decreased slightly.