紫铜表面吸附膜的制备及性能研究

Preparation and Performance Research of Adsorbed Film on Copper Surface

为解决紫铜表面抗氧化变色问题,以甲基硅酸钠、环氧烷衍生物、多聚磷酸酯为原料,采用浸泡方法在紫铜片表面制备防腐蚀吸附膜。采用硝酸点滴法、Tafel曲线、电化学阻抗谱表征膜层耐蚀性,利用原子力显微镜观察膜层微观结构形貌。通过单因素试验筛选出最佳成膜工艺条件为7.0%甲基硅酸钠溶液,7.0%环氧烷衍生物,2.0%多聚磷酸酯,以最佳新工艺制备的膜层均匀致密,具有很好的耐蚀性。

Selecting methyl sodium silicate, alkylene oxide derivate and poly phosphate ester as raw materials, the anticorrosive films were prepared by soaking method on the surface of copper sheet. In addition, the corrosion resistance of sample was evaluated by nitric acid drop method, tafel curve and electrochemical impedance curve, and the microstructure morphology of films was observed by atomic force microscopy. The optimal process conditions were confirmed by single factor experiment： 7.0% methyl sodium silicate,7.0% alkylene oxide derivate, 2.0% poly phosphate ester. Moreover, the film obtained under the optimal conditions possessed dense uniform structure and good corrosion resistance.