摘要
采用浸涂技术,在6061铝合金表面制备了γ-氨丙基三甲氧基硅烷膜。采用电化学方法和SEM研究了其在3.5%NaCl溶液中的耐蚀性及形貌。结果表明,当硅烷浓度为3%(体积分数),溶液pH为12,室温下水解时间72h形成的硅烷溶液具有较好的稳定性;铝合金试样在硅烷溶液中浸涂3min,固化温度180℃,固化时间120min,其表面形成的硅烷膜的耐蚀性最佳,表现为腐蚀电流密度降低和腐蚀电位的升高。
The 7-aminopropyhriethoxysilane film was deposited on 6061 aluminium alloy surface. The corrosion resistance of the silane film was investigated in 3. 5% NaCl solution, using Tafel polarization curves. The results showed that silane solution was stable when the silane concentration was 3%, pH value was 12 and time of hydrolysis was 72 h at room temperature. When aluminum alloy specimen in silane solution was treated by dit〉coating 3 rain, curing temperature 180 C and curing time 120 min. the obtained silane films on 6061 aluminium alloy surface had the best corrosion resistance, the corrosion current density reduced and corrosion potential rose.
出处
《腐蚀与防护》
CAS
北大核心
2014年第1期64-68,共5页
Corrosion & Protection
关键词
铝合金
硅烷膜
极化曲线
耐蚀性
aluminium alloy
silane film
polarization curve
corrosion resistance
