摘要
采用X射线光电子能谱（XPS）、俄歇（AES）深度剖析等表面分析技术，并结合扫描电镜（SEM）和动电位极化实验研究了LY12CZ铝合金表面铈转化膜的形成条件、耐蚀性和组成结构。研究结果表明：当Ce3＋离子超过临界缓蚀浓度，开路电位下形成的铈转化膜比自然氧化铝膜具有更强的抗点蚀性。铈转化膜呈多层经构，其表层由结晶态的CeO2和无定形。
Auger depth profiling, X-ray photoelectron spectroscopy, scanning electron microscopy and potentiodynamic polarization are used to study the formation, component structure and anto-corrosion properties of the cerium conversion coating on the surface of LY12CZ aluminium alloy. Results show that the pitting resistance of this coating formed at open-circuit potential is superior to that of the natural Al2O3 film, Ce3+ ions surpassing the critical inhibitive concentration. This coating contains a multi-layer structure, which consists of crytalline CeO2 and non-stoichiometric amorphous nCe(OH)3 mCe(OH)4.
出处
《东莞理工学院学报》
1998年第1期18-21,共4页
Journal of Dongguan University of Technology
