铜离子与植酸作用制备镁合金超疏水表面及耐腐蚀性能研究

Corrosion Resistant Superhydrophobic Surface on Magnesium Alloy via the Interaction between Cu^(2+) and Phytic acid

本文通过在植酸和硫酸铜共同作用下,在镁合金表面形成粗糙的表面结构。经过十六烷基三甲氧基硅烷浸泡、高温处理后,在镁合金表面形成了淡蓝色的超疏水的表面。探究了植酸溶液的p H值、循环次数对疏水性能的影响。结果显示在植酸p H值2～3、循环次数为7次时,样品表面的疏水性达到最佳。接触角达到161°,滚动角为4°。利用扫描电子显微镜、接触角测量仪、能谱仪对样品的形貌、润湿性、化学成分进行分析。通过电化学工作站测量极化曲线对样品的腐蚀性能进行分析,结果表明在植酸p H值2～3、循环次数为7次时得到的样品腐蚀电流密度最小,具有最好的耐腐蚀性能。

In this paper,rough surface structure was formed on magnesium alloy surface by the combined action of phytic acid and copper sulfate.After immersing in hexadecyltrimethoxysilane and high temperature treatment,a light blue superhydrophobic surface was formed on the surface of magnesium alloy.The effects of PH value and cycle times of phytic acid on hydrophobic properties were investigated.The results showed that the hydrophobicity of the sample surface reached the best when the PH2 ~ 3 of phytic acid and the number of cycles were 7.The contact angle and rolling angle are 161° and 4° respectively.The morphology,wettability and chemical composition of the samples were analyzed by scanning electron microscopy,contact angle measuring instrument and energy dispersive spectrometer respectively.The corrosion properties of the samples were analyzed by polarization curves measured by electrochemical workstation.The results showed that the corrosion current density of the samples was the smallest when PH2~3 phytic acid was recycled 7 times.