铝合金阳极氧化膜低温无镍封孔工艺及其封孔性能  

A low-temperature nickel-free sealing process for anodic oxide film on aluminum alloys and its sealing performance

作　　者：张策 张德忠 郭俊灏 王成 郭涌 赵涛 王泽 Zhang Ce;Zhang Dezhong;Guo Junhao;Wang Cheng;Guo Yong;Zhao Tao;Wang Ze(Wuhan Material Protection Research Institute Co.,Ltd.,Wuhan 430030,China;Shanghai Yinghui Technology Development Co.,Ltd.,Shanghai 201814,China;Yuancheng Fine Chemical Development Co.,Ltd.,Shenzhen 518100,China)

机构地区：[1]武汉材料保护研究所有限公司,湖北武汉430030 [2]上海英汇科技发展有限公司,上海201814 [3]深圳市原诚精细化工开发有限公司,广东深圳518100

出　　处：《电镀与精饰》2024年第1期20-27,共8页Plating & Finishing

摘　　要：为克服传统沸水封孔高能耗和镍盐封孔污染环境的不足,研制了一种无镍低温封孔工艺,其工艺为:锂盐20~30 g/L,氟锆酸盐3.0~5.0 g/L,表面活性剂1.0~2.0 g/L,有机添加剂N 2.0~4.0 mL/L,温度35~55℃,pH 5.0~5.4,封闭时间宜控制在2~3 min/μm。通过酸浸蚀失重试验和电化学试验法对封孔质量和封孔膜的耐蚀性进行评价。结果表明:采用配制的低温无镍封孔剂进行封闭,膜层酸浸蚀失重<30 mg·dm-2,电化学性能明显改善,其封孔效果优于沸水封孔,略差于常温镍盐封孔。In order to overcome the shortcomings of traditional boiling water sealing with high energy consumption and nickel salt sealing environment pollution,a nickel-free low-temperature sealing process was developed,which includes lithium salt 20-30 g/L,fluorozirconate 3.0-5.0 g/L,surfactant 1.0-2.0 g/L and organic additive N 2.0-4.0 mL/L.The temperature is 35-55℃,pH value is 5.0-5.4,and the sealing time should be controlled at 2-3 min/μm.The sealing quality was evaluated by acid etching test,and the corrosion resistance of the sealing film was evaluated by electrochemical test.The results show that when the low-temperature nickel-free sealing process is used for sealing,the weight loss of the anodic oxide film is less than 30 mg·dm-2 after acid etching,and the electrochemical performance is obviously improved.The sealing quality is better than that of boiling water sealing process and slightly worse than that of normal temperature nickel salt sealing process.

关 键 词：铝合金 阳极氧化 无镍封孔 低温 

分 类 号：TQ153.6[化学工程—电化学工业]