【摘要】 室温条件下采用含K₂ZrF₆ 1.75g/L、MgSO₄ 1.00g/L、NaF 1.25g/L、着色剂1.0g/L和稳定剂0.25g/L的溶液,在镁合金表面制备了黄色的锆盐转化膜。采用极化曲线、电化学阻抗谱和点滴腐蚀试验研究了锆盐转化膜的耐蚀性,利用扫描电镜（SEM）、能谱（EDS）和X射线光电子能谱（XPS）分析了它的表面形貌、成分与结构。结果表明:锆盐转化膜为网状结构,裂纹均匀,主要由Mg、Zr、O、F、C等元素组成,能使镁合金的耐腐蚀性得到显著提升。更多还原

【Abstract】 A yellow Zr-based conversion coating was prepared on the surface of magnesium alloy from a bath composed of K₂ZrF₆ 1.75 g/L,MgSO₄ 1.00 g/L,NaF 1.25 g/L,coloring agent 1.0 g/L and stabilizing agent 0.25 g/L.The corrosion resistance of the Zr-based conversion coating was studied by polarization curve measurement,electrochemical impedance spectroscopy and dropping corrosion test.The surface morphology,composition and structure of the Zr-based conversion coating were analyzed by scanning electron microscopy（SEM）,energy-dispersive spectroscopy（EDS） and X-ray photoelectron spectroscopy（XPS）.The results showed that the Zr-based conversion coating presents a network structure with uniform distribution of cracks,mainly composed of Mg,Zr,O,F,C and other elements,and greatly improves the corrosion resistance of magnesium alloy substrate.更多还原