机构地区: 东莞理工学院
出 处: 《材料保护》 1998年第10期15-17,共3页
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Ce^3+超过临界缓蚀浓度时,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.铈转化膜呈多层结构,其表层由结晶态的CeO_2和无定形、非化学计量的nCe(OH)_3mCe(OH)_4组成. The formation, structure and corrosion resistance of cerium conversion film on alummum alloy were studied by XPS, AES, SEM and potentiodynamic polarization expcriments. The film revealed itself as a multilayer structure. It consisted of Crystalline CeO_2 and amorphous non-stoichiometrical nCe(OH)_3m Ce (OH)_4.