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紫铜及铝青铜合金高耐蚀性阳极氧化工艺研究与生产应用

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  • 1海装广州局; 2重庆长安望江工业集团有限公司
林 巧(1987-),本科,高级工程师,主要研究方向为表面处理,电话:18983170392,E-mail:552797181@qq.com

收稿日期: 2023-04-25

  修回日期: 2023-05-25

  录用日期: 2023-06-04

  网络出版日期: 2023-10-15

Research and Production Application of High Corrosion Resistance Anodizing Process for Red Copper and Aluminum Bronze Alloy

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  • (1.Haizhuang Guangzhou Bureau, Chongqing 400010, China;2.Chongqing Chang’an Wangjiang Industry Group Co., Ltd., Chongqing 401120, China)

Received date: 2023-04-25

  Revised date: 2023-05-25

  Accepted date: 2023-06-04

  Online published: 2023-10-15

摘要

为改良T1 紫铜、QAl9-4 铝青铜合金的外观并提高耐腐蚀性能,使用氢氧化钠、钼酸铵的水溶液作为工作溶液,对T1 紫铜、QAl9-4 铝青铜合金进行阳极氧化处理。 采用扫描电子显微镜、能谱和金相显微镜测试2 种材料表面的阳极氧化膜层的显微形貌、主要成分和金相组织,从而优化阳极氧化工艺参数。 通过外观检测、附着强度测试、耐高温、中性盐雾试验等检测方法考核了阳极氧化膜层的综合性能。 结果表明:阳极氧化电流密度为1.0 A/dm2,时间为25~30 min,温度为80~90 ℃时,可以获得厚度为1~3 μm、可耐温400 ℃的黑色氧化膜。 经适当封闭处理的2 种材料表面的阳极氧化膜层阻碍了腐蚀介质的扩散,T1 紫铜耐腐蚀性提高6.0 倍,QAl9-4 铝青铜合金耐腐蚀性提高2.5 倍。 生产应用表明该工艺稳定、操作简便,适用于T1 紫铜、QAl9-4 铝青铜合金材料产品大批量生产,能够满足产品装饰性、消光性、耐高温性和耐腐蚀性要求。

本文引用格式

成赫鹏, 林巧, 罗金山, 陈端杰, 傅文亮, 高怀亮 . 紫铜及铝青铜合金高耐蚀性阳极氧化工艺研究与生产应用[J]. 材料保护, 2023 , 56(10) : 147 -154 . DOI: 10.16577/j.issn.1001-1560.2023.0246

Abstract

To improve the appearance and corrosion resistance of T1 red copper and QAl9-4 aluminum bronze alloys, an aqueous solution of sodium hydroxide and ammonium molybdate was used as the working solution to anodize T1 red copper and QAl9-4 aluminum bronze alloys.The microstructure, primary composition,and metallographic structure of the anodic oxide film on both materials were characterized using scanning electron microscopy, energy-dispersive spectroscopy, and metallographic microscopy, facilitating the optimization of anodic oxidation process parameters.The comprehensive performance of the anodic oxide film was assessed through appearance inspection, adhesion strength testing, high-temperature resistance, and neutral salt spray tests.Results indicated that under conditions of an anodic oxidation current density of 1.0 A/dm2, duration of 25~30 min,and a temperature range of 80~90 °C,a black oxide film of 1~3 μm thickness capable of withstanding temperatures up to 400 °C was achieved.Properly sealed anodic oxide films on both materials impeded the diffusion of corrosive medium, improving the corrosion resistance of T1 copper by 6.0 times and QAl9-4 aluminum bronze alloy by 2.5 times.Production applications demonstrated that the process was stable and easy to operate, making it suitable for mass production of T1 copper and QAl9-4 aluminum bronze alloy products, meeting decorative, matte, high-temperature resistance and corrosion resistance requirements.

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