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Hydrothermal treatment and butylphosphonic acid derived self-assembled monolayers for improving the surface chemistry and corrosion resistance of AZ61 magnesium alloy

机译:水热处理和丁基膦酸衍生的自组装单层膜用于改善AZ61镁合金的表面化学性质和耐腐蚀性

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摘要

The hydrothermal treatment followed by a self-assembled monolayer (SAM) of 1-butylphosphonic acid through the tethering by aggregation and growth (T-BAG) method was employed to produce protective surface coatings on the Mg-6Al-1Zn alloy (AZ61) for reducing the degradation rate in physiological environments. Potentiodynamic polarization measurements revealed that the organic self-assembled monolayer and Mg(OH)2 coating can further enhance the surface chemical stability and corrosion resistance of Mg alloys. SAM-treated Mg(OH)2 coatings can be served as a more passive surface layer as a result of their much higher charge transfer resistance and the presence of Warburg impedance in electrochemical impedance spectroscopy measurement.
机译:通过水热处理,然后通过聚集和生长的束缚(T-BAG)方法对1-丁基膦酸进行自组装单分子层(SAM),以在Mg-6Al-1Zn合金(AZ61)上制备保护性表面涂层。降低生理环境中的降解率。电位动力学极化测量表明,有机自组装单层和Mg(OH)2涂层可以进一步增强Mg合金的表面化学稳定性和耐腐蚀性。由于SAM处理的Mg(OH)2涂层具有更高的电荷转移电阻和电化学阻抗谱测量中存在的Warburg阻抗,因此可以用作更钝化的表面层。

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