B10铜合金超双疏表面的制备及其性能研究

Preparation and Corrosion Resistance of SuperamphiphobicSurface on B10 Cu-alloy

采用FeCl3盐溶液刻蚀以及氟硅烷修饰的方法,在B10铜合金基体上成功制备出具有良好耐蚀性的超双疏表面,其对水与乙二醇的接触角分别为158°和151°。采用扫描电子显微镜(SEM)、激光扫描共聚焦显微镜(LSCM)、X射线衍射仪(XRD)、能谱仪(EDS)和X射线光电子能谱(XPS)等手段对其表面微观形貌、化学成分进行表征。通过电化学阻抗谱(EIS)测试以及Tafel极化曲线探究了超双疏试样的耐腐蚀性能。结果表明,相较于裸样,超双疏试样的自腐蚀电位正移至-0.248V,腐蚀电流密度(Icorr=2.05×10^(-6)A·cm^(-2))降低了一个数量级,展现出优异的耐腐蚀性能;在3.5%(质量分数)NaCl溶液中浸泡5d后,超双疏试样的电荷转移电阻仍明显高于裸样,保持着较好的耐蚀性。

A superamphiphobic surface film with good corrosion protection durability was successfully prepared on B10 Cu-alloy by chemical etching with 1.5 mol/L FeCl3 solution and then modifying with 1H,1H,2H,2H-perfluorodecyltriethoxysilane.The contact angle of water and ethylene glycol on the prepared surface is 158°and 151°respectively.The morphology,chemical composition and corrosion resistance of the superamphiphobic surface film/B10 Cu-alloy were characterized by means of SEM,XRD,EDS and XPS as well as EIS test and Tafel polarization curve and electrochemical test.The results show that compared with the bare B10 Cu-alloy,the corrosion potential of the superamphiphobic surface film/B10 Cu-alloy is positively shifted to-0.248 V,its corrosion current density Icorr=2.05×10^(-6)A·cm^(-2)decreases by one order of magnitude,and the charge transfer resistance increases by one order of magnitude,showing excellent corrosion resistance.The charge-transfer resistance of the superamphiphobic film/B10 Cu-alloy after immersion in 3.5%NaCl solution for 5 d is still significantly higher than that of the bare Cu-alloy,in other words,it still maintains good corrosion resistance.