[1]王 成*,赵永志,蒋赞勤,等.doi: 10.3969/j.issn.1001-3849.2025.11.016微波组件壳体导电化学氧化膜层耐温性研究[J].电镀与精饰,2025,(11):113-121.
　Wang Cheng*,Zhao Yongzhi,Jiang Zanqin,et al.Study on the temperature resistance of the conductive chemical conversion film coating of the casing of microwave components[J].Plating & Finishing,2025,(11):113-121.
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doi: 10.3969/j.issn.1001-3849.2025.11.016微波组件壳体导电化学氧化膜层耐温性研究()

《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2025年11
页码:
113-121
栏目:
出版日期:
2025-11-30

文章信息/Info

Title:
Study on the temperature resistance of the conductive chemical conversion film coating of the casing of microwave components
作者:
王 成*;  赵永志;  蒋赞勤;  张 帅
(中国电子科技集团公司 第十三研究所,河北 石家庄 050000)
Author(s):
Wang Cheng*;  Zhao Yongzhi;  Jiang Zanqin;  Zhang Shuai
(The 13th Research Institute of China Electronics Technology Group Co., Shijiazhuang 050000, China)
关键词:
铝合金; 腐蚀; 微波组件; 氧化膜层
Keywords:
aluminum alloy;  corrosion;  microwave components;  oxide coating
分类号:
TG178
文献标志码:
A
摘要:
导电化学氧化技术是微波组件壳体表面处理方式中的最常用手段，导电化学氧化膜层的耐高温边界直接影响到微波组件的接地性能、壳体的耐腐蚀性能以及采用自动化回流焊工艺的可行性。在微波组件封装材料表面分别制备了铬酸盐、磷酸型铬酸盐两种化学转化膜层，并对试样按三个温度水平进行加热，加热时间不同。加热温度和时间分别为120 ℃&30 min、200 ℃&60 min和250 ℃&10 min，用常温不加热的试件作为对照，对比分析高温加热对膜层的外观、导电性及耐蚀性的影响。结果表明：铬酸盐氧化膜层耐蚀性要优于磷酸型铬酸盐氧化膜层，经历200 ℃以上会使两种膜层耐蚀性下降；以铝合金4047、5A06、6061和6063为基材的铬酸盐、磷酸型铬酸盐两种化学转化膜层在250 ℃加热10 min后，膜层的导电性、耐蚀性仍能满足国标环境试验中严苛的交变湿热及盐雾试验要求；磷酸型铬酸盐氧化膜层的接触电阻及外观在经历高温前后无明显变化。铬酸盐氧化膜层的接触电阻经历高温后显著降低，外观颜色经历高温后变暗淡。
Abstract:
Conductive chemical conversion film was the most commonly used method for the surface treatment of the casing of microwave components. On the one hand, the high-temperature resistance boundary of the conductive chemical conversion film layer affected the grounding performance of the microwave components and the corrosion resistance of the casing directly. On the other hand, the feasibility of adopting the automated reflow soldering process was influnced by the high-temperature resistance boundary. Two types of chemical conversion coatings, namely chromate coating and phosphate-type chromate coating, were prepared respectively using the commonly used materials of microwave components. And the samples were heated under the conditions of room temperature, 120 ℃ for 30 minutes, 200 ℃ for 60 minutes, and 250 ℃ for 10 minutes. Then, a comparison was carried out to verify the influence of high temperature on the appearance, electrical conductivity and corrosion resistance of the coating. The results show that: the corrosion resistance of the chromate oxide coating is better than that of the phosphate-type chromate oxide coating, and exposure to temperatures above 200 °C will reduce the corrosion resistance of the coating. The two types of chemical conversion coatings namely chromate coating and phosphate-type chromate coating, with aluminum alloys 4047, 5A06, 6061 and 6063 as the base materials are heated to 250 °C for 10 minutes, the electrical conductivity and corrosion resistance of the coatings can still meet the stringent requirements of the alternating damp heat and salt spray tests in the national standard environmental tests. The contact resistance and appearance of the chromate oxide film layer of phosphoric acid type showed no significant changes before and after being exposed to high temperature. The contact resistance of the chromate oxide film layer significantly decreases after being exposed to high temperature, and its appearance color becomes dull after being exposed to high temperatures

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