Cerium salt activated nanoparticles as fillers for silane films: Evaluation of the corrosion inhibition performance on galvanised steel substrates
Cerium salt activated nanoparticles as fillers for silane films: Evaluation of the corrosion inhibition performance on galvanised steel substrates
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DOI：
10.1016/j.electacta.2007.05.022
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发表时间：
2007-08
影响因子：
6.6
通讯作者：
M. F. Montemor;M. Ferreira
中科院分区：
文献类型：
--
作者：
M. F. Montemor;M. Ferreira
研究了用铈离子活化的SiO2或CeO 2纳米粒子改性的双-[三乙氧基硅丙基]四硫化物硅烷（BTESPT）溶液预处理镀锌钢基体的电化学行为。通过电化学阻抗谱评估预处理的基材的电化学行为，以评估纳米颗粒在硅烷膜电阻和电容中的作用。通过扫描振动电极技术（SVET）研究了Ce活化纳米颗粒在微尺度上减轻人工诱导缺陷中腐蚀活性的能力。使用动电位极化进行补充研究。结果表明，纳米粒子的存在下，增强了硅烷膜的阻隔性能，并且似乎是一个协同作用之间创建的活化的纳米粒子和铈离子，降低腐蚀活性。CeO 2纳米粒子的加入比SiO2纳米粒子的加入更有效。
The present work investigates the electrochemical behaviour of galvanised steel substrates pre-treated with bis-[triethoxysilylpropyl] tetrasulfide silane (BTESPT) solutions modified with SiO2or CeO2nanoparticles activated with cerium ions. The electrochemical behaviour of the pre-treated substrates was evaluated via electrochemical impedance spectroscopy in order to assess the role of the nanoparticles in the silane film resistance and capacitance. The ability of the Ce-activated nanoparticles to mitigate corrosion activity at the microscale level in artificial induced defects was studied via scanning vibrating electrode technique (SVET). Complementary studies were performed using potentiodynamic polarisation. The results show that the presence of nanoparticles reinforces the barrier properties of the silane films and that a synergy seems to be created between the activated nanoparticles and the cerium ions, reducing the corrosion activity. The addition of CeO2nanoparticles was more effective than the addition of SiO2nanoparticles.