An electrochemical and superficial assessment of the corrosion behavior of AA 2024-T3 treated with metacryloxypropylmethoxysilane and cerium nitrate
An electrochemical and superficial assessment of the corrosion behavior of AA 2024-T3 treated with metacryloxypropylmethoxysilane and cerium nitrate
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DOI：
10.1016/j.surfcoat.2008.06.173
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发表时间：
2008-08
影响因子：
5.4
通讯作者：
S. Tamborim;A.P.Z. Maisonnave;D. Azambuja;G. Englert
中科院分区：
文献类型：
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作者：
S. Tamborim;A.P.Z. Maisonnave;D. Azambuja;G. Englert
研究了在2024 T-3铝合金表面沉积甲基丙烯酰氧基丙基甲氧基硅烷（MAOS）和硝酸铈的处理方法对铝合金腐蚀行为的影响。通过电化学阻抗谱（EIS）在浸泡在0.1 M的Na 2SO 4和NaCl溶液中的耐腐蚀性进行了评价。原子力显微镜（AFM），扫描电子显微镜（SEM）和能量色散光谱（EDS）也被用来进行处理前后的表面分析。电化学结果表明，硝酸铈，当存在于两层MAOS（MAOS型沉积层）之间时，提高了耐腐蚀性。这可以归因于富含硅和铈的内层和另一个外部MAOS层的存在，这进一步改善了该层的阻挡效果。
The present work aims at studying the corrosion behavior of treatments based on the deposition of layers of metacryloxypropylmethoxysilane (MAOS) and/or cerium nitrate on aluminum alloy 2024 T-3 (AA2024-T3). The corrosion resistance was evaluated by electrochemical impedance spectroscopy (EIS) during immersion in 0.1 M Na2SO4and NaCl solutions. Atomic force microscopy (AFM), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were also used to perform a surface analysis before and after the treatments. The electrochemical results show that cerium nitrate, when present between two layers of MAOS (sandwich-type deposited layer), improves the corrosion resistance. This can be attributed to the presence of an internal layer rich in silicium and cerium and another external MAOS layer, which further improves the barrier effect of the layer.