Corrosion protection of aluminium alloy AA2024 with cerium doped methacrylate-silica coatings
Corrosion protection of aluminium alloy AA2024 with cerium doped methacrylate-silica coatings
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DOI：
10.1007/s10971-009-2010-6
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发表时间：
2009-10-01
影响因子：
2.5
通讯作者：
Aparicio, M.
中科院分区：
文献类型：
--
作者：
Rosero-Navarro, N. C.;Pellice, S. A.;Aparicio, M.
这项工作的目的是合成和表征掺有铈盐的混合涂层，用于 AA2024 的腐蚀防护。控制无机和有机聚合过程可以制备具有开放结构和亲水特性的涂料。这些事实促进了铈离子在结构中的结合和移动，增强了其促进自我修复机制的能力。涂层的热处理温度限制在 120 A 摄氏度，以保持合金的机械性能。通过 EIS 技术在 0.3 wt% NaCl 溶液中评估了涂层的电化学行为。电化学测量证明在初始浸泡时间具有良好的阻隔性能，并且在长浸泡时间来自铈离子的腐蚀抑制信号可归因于低频下阻抗模量的增加和氧化铈/氢氧化物沉淀的存在。
The aim of this work is the synthesis and characterization of hybrid coatings doped with cerium salts for corrosion protection of AA2024. The control of the inorganic and organic polymerization process allows the preparation of coatings with an open structure and a hydrophilic character. These facts facilitate the incorporation and mobility of cerium ions through the structure, enhancing its ability to promote a self-healing mechanism. The thermal treatment of the coatings has been limited to 120 A degrees C to preserve the mechanical properties of the alloy. The electrochemical behaviour of the coatings has been evaluated in 0.3 wt% NaCl solution by means of EIS technique. Electrochemical measurements evidence good barrier properties at initial immersion time, and signals of corrosion inhibition from cerium ions at long immersion times could be assigned to the increasing of the impedance modulus at low frequencies and the presence of cerium oxide/hydroxide precipitates.