摘要
选取建筑常用的铝合金6063作基体,阳极氧化后采用铈盐封孔,并研究铈盐封孔工艺参数对封孔后阳极氧化膜腐蚀失重的影响。结果表明:随着双氧水浓度从0 mL/L增加到9 mL/L、硝酸铈浓度从2.5 g/L增加到9.0 g/L、温度从25℃升高到65℃、封孔时间从10 min延长到50 min,封孔后阳极氧化膜的腐蚀失重都呈先降低后增加的趋势。最佳的铈盐封孔工艺参数为:双氧水浓度5 mL/L、硝酸铈浓度5.5 g/L、温度45℃、封孔时间30 min,采用此工艺参数封孔后阳极氧化膜含有Ce元素,可能以氢氧化物形式填充阳极氧化膜的孔洞。与未封孔阳极氧化膜相比,封孔后阳极氧化膜表面较致密,表现出良好的耐蚀性,能更好地满足对于建筑铝合金装饰性和耐蚀性的要求。
Aluminum alloy 6063,which was commonly used in architectural,was anodized and then sealed with cerium salt. The effect of cerium salt sealing process parameters on the corrosion weight loss of anodic oxide film after sealing was studied. The results showed that with the increase of hydrogen peroxide concentration from 0 mL/L to 9 mL/L,the increase of cerium nitrate concentration from2.5 g/L to 9.0 g/L,the rise of temperature from 25 ℃ to 65 ℃,and the extension of sealing time from10 min to 50 min,the corrosion weight loss of anodic oxide film decreased first and then increased. The optimal cerium salt sealing process parameters were as follows:hydrogen peroxide 5 mL/L,cerium nitrate 5.5 g/L,temperature 45 ℃ and sealing time 30 min,and the anodic oxide film after sealing contains Ce element,which may exist in the form of hydroxide and can fill the holes of anodic oxide film.Compared with unsealed anodic oxide film,the anodic oxide film after sealing has compact micromorphology and exhibited good corrosion resistance,it can better meet the requirements of decoration and corrosion resistance of aluminum alloy for architectural.
作者
吴姗姗
于瑾佳
刘历波
WU Shanshan;YU Jinjia;LIU Libo(Hebei Energy College of Vocation and Technology,Tangshan 063000,China;Hebei University of Engineering,Handan 056038,China)
出处
《电镀与精饰》
CAS
北大核心
2022年第4期1-6,共6页
Plating & Finishing
基金
河北省自然科学基金(E2013402077、E2006000630)。
关键词
阳极氧化膜
铈盐封孔
建筑铝合金
双氧水浓度
硝酸铈浓度
anodic oxide film
cerium salt sealing
architectural aluminum alloy
hydrogen peroxide concentration
cerium nitrate concentration
