硅烷预处理对7204铝合金表面MFI沸石膜形貌与耐蚀性的影响  

Effect of silane pretreatment on morphology and corrosion resistance of MFI zeolite film on the surface of 7204 aluminum alloy

作　　者：陈舒杨 陈永桂 陈琼 陈翔 陈明安[1] CHEN Shuyang;CHEN Yonggui;CHEN Qiong;CHEN Xiang;CHEN Ming’an(School of Materials Science and Engineering,Central South University,Changsha 410083,China)

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《电镀与涂饰》2023年第8期26-33,共8页Electroplating & Finishing

摘　　要：采用3-氨丙基三乙氧基硅烷(APTES)对7204铝合金进行预处理,然后通过水热合成法制备沸石膜层,以直接在7204铝合金表面水热合成的沸石膜作为对照,考察了硅烷预处理对沸石膜形貌与耐蚀性的影响。扫描电子显微镜(SEM)观察表明,硅烷预处理促进了沸石膜形核,使沸石颗粒尺寸减小。在3.5%NaCl溶液中的极化曲线和电化学阻抗谱测试的结果表明,硅烷/沸石膜具有比单纯沸石膜更长久的耐蚀性,这归因于硅烷预处理可以促进沸石膜凝胶层的形成。A zeolite film was prepared by hydrothermal synthesis on the surface of 7204 aluminum alloy pretreated with 3-aminopropyltriethoxysilane(APTES).The effect of silane pretreatment on morphology and corrosion resistance of zeolite film was studied with the zeolite film synthesized directly on the surface of 7204 aluminum alloy as a control.The scanning electron microscopy(SEM)observation indicated that the silane pretreatment facilitated the nucleation of zeolite film,resulting in a reduction of zeolite particle size.The results of polarization curve measurement and electrochemical impedance spectroscopy(EIS)in 3.5%NaCl solution showed that the silane/zeolite film exhibited superior long-term corrosion resistance to the pure zeolite film,which was attributed to the enhancement of the gel layer formation in zeolite film through the silane pretreatment.

关 键 词：铝-锌-镁合金 硅烷偶联剂 沸石膜 水热合成法 耐蚀性 

分 类 号：TG178[金属学及工艺—金属表面处理]