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首页> 外文会议>2006 BIMW >Structural Characterization and Corrosion Properties of BTESPT Silane Films on Surface of 2024-T6 Aluminium Alloy
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Structural Characterization and Corrosion Properties of BTESPT Silane Films on Surface of 2024-T6 Aluminium Alloy

机译：2024-T6铝合金表面BTESPT硅烷膜的结构表征和腐蚀性能

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摘要

2024-T6 Al alloy sheet s were modified by bis-[triethoxysilylpropyl] tetrasulfide (BTESPT) silane film to improve the corrosion resistance. Fourier-Transform Reflection Absorption (FTIR-RA) spectroscopy was used for structural characterization of BTESPT silane film formed on surface of the sheet. Potentiodynamic polarization and immersion test in 3.5% NaCl solution were used for evaluating the corrosion performances of the silane film. The results showed that the film formed after curing at 120°C for 40 min was cross-linked through Si-O-Si and that it was covered on the entire surface of the sheet. The content of elements S and Si on the Al_2CuMg particles is a little higher that of on the matrix. The strong peak at 1032 cm~(-1) indicated that the film was linked to the sheet by Si-O-Al. Compared to the untreated case, the corrosion current density of the sheet treated with the silane film was reduced by close to 2 orders. Treatment of BTESPT silane can provide about 670 h protection of corrosion for the sheet in 3.5% NaCl water solution.
机译：2024-T6铝合金薄板用双[三乙氧基甲硅烷基丙基]四硫化物（BTESPT）硅烷膜改性，以提高耐蚀性。傅里叶变换反射吸收（FTIR-RA）光谱用于在薄片表面上形成的BTESPT硅烷膜的结构表征。用电位动力学极化和在3.5％NaCl溶液中的浸没试验来评估硅烷膜的腐蚀性能。结果表明，在120℃下固化40分钟后形成的膜通过Si-O-Si交联并且覆盖在片的整个表面上。 Al_2CuMg颗粒中元素S和Si的含量略高于基体中元素S和Si的含量。在1032cm〜（-1）处的强峰表明该膜通过Si-O-Al连接到片上。与未处理的情况相比，经硅烷膜处理的板的腐蚀电流密度降低了近2个数量级。 BTESPT硅烷的处理可以在3.5％NaCl水溶液中为板材提供约670小时的防腐保护。

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