文献类型：期刊文献

中文题名：6061铝合金表面氟钛酸盐改性硅烷膜的耐蚀性能

英文题名：Corrosion Resistance of 6061 Aluminum Alloy Silane Film Modified with Hexafluorotitanate

作者：贾丰春[1];马国扬[2];李红玲[2]

第一作者：贾丰春

机构：[1]河南工学院电气工程系;[2]新乡学院化学化工学院

第一机构：河南工学院电气工程系,河南新乡453000

年份：2018

卷号：51

期号：9

起止页码：70-73

中文期刊名：材料保护

外文期刊名：Materials Protection

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

基金：河南省科技发展计划项目(1521023102122)资助

语种：中文

中文关键词：6061铝合金;氟钛酸盐;改性;硅烷膜;耐蚀性

外文关键词：6061 aluminum alloys;hexafluorotitanate;modification;silane film;corrosion resistance

摘要：为进一步提高铝合金表面硅烷转化膜的耐蚀性能,采用氟钛酸盐改性硅烷形成复合转化液,并在6061铝合金表面制备硅烷-氟钛酸盐转化膜。采用极化曲线、CuSO_4点滴试验、盐水浸泡试验及盐雾试验评价转化膜的耐蚀性;研究了氟钛酸盐用量对复合膜耐蚀性的影响,并比较了单一转化膜和复合转化膜的耐蚀性。结果表明:氟钛酸盐的最佳用量为1.0×10^(-3)mol/L,此时复合膜的自腐蚀电流密度最小,极化电阻最大,腐蚀面积最少,耐CuSO4点滴时间最长,最佳氟钛酸盐用量下改性硅烷复合膜的自腐蚀电流密度相对于硅烷转化膜下降了1个数量级,24h中性盐雾后表面几乎没有白锈产生,盐水浸泡的腐蚀速率最小。
In order to improve the corrosion resistance of silane film on aluminum alloy, the hexafluorotitanate-modified silane was designed as composite conversion solution, and then the silane-hexafluorotitanate conversion film was obtained on the surface of 6061 aluminum alloy. The corrosion resistance of conversion film was characterized by polarization curves, CuSO4 drip test, salt water immersion test and salt spray test. Moreover, the effect of hexafluorotitanate concentration on the corrosion resistance of composite film was studied, and the corrosion resistance of single conversion film and composite film was compared. Results showed that the optimal concentration of hexafluorotitanate was 1.0× 10^-3 mol/L, and the as-prepared film had the minimum self-corrosion current density, the maximum polarization resistance, the least corrosion area and the longest resistance time of CuSO4 drop test. The corrosion current density of modified silane film prepared with the optimal concentration of hexafluorotitanate decreased by 1 order of magnitude in comparison with that of silane film. Furthermore, after neutral salt spray for 24 h, little white rust generated on the surface of aluminum alloy, and the corrosion rate in salt water was the smallest.