Effects of corrosion on the electrical properties of conducted finishes for EMI shielding

National Symposium on Electromagnetic Compatibility Pub Date : 1989-05-23 DOI:10.1109/NSEMC.1989.37149

B. Archambeault, R. Thibeau

{"title":"Effects of corrosion on the electrical properties of conducted finishes for EMI shielding","authors":"B. Archambeault, R. Thibeau","doi":"10.1109/NSEMC.1989.37149","DOIUrl":null,"url":null,"abstract":"A variety of combinations of fingerstock materials both before and after exposure to an accelerated atmospheric corrosion environment was tested. The following materials/finishes were tested during this study: 304 stainless steel, passivated, MIL STD QQ-P-35B; 1010 steel, electroplated bright tin, 0.0003 in. nominal coating thickness, ASTM B545; 1010 steel, electroplated nickel 0.0005 in. nominal coating thickness, ASTMB689; 1010 steel, electroless nickel, 0.0005 in. coating thickness; 1010 steel, zinc-plated, 0.0005 in. plating thickness with yellow chromate conversion coating; 1010 steel, zinc-plated, 0.0002 in. minimum zinc thickness, with blue-bright chromate conversion coating; electrogalvanized steel, 0.0007 in. zinc thickness, with yellow chromate conversion coating; steel with hot-dipped aluminum-zinc (55:45) coating, 0.0008 in. coating thickness; 5052 aluminum, with yellow chromate conversion coating; and 5052 aluminum, with clear chromate conversion coating, ASTM B449, class 3. Metal panels were mated with beryllium copper fingerstock to make the joints typical of computer enclosure doors and panels. The finishes on the beryllium copper were: electroplated bright tin; electroplated bright nickel; electroplated tin-lead (60:40); and bright dip (a thin chromated conversion coating). The transfer impedance of the joint was used to measure the electrical performance and then the corrosion resistance of the conductive finishes.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"70 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"National Symposium on Electromagnetic Compatibility","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/NSEMC.1989.37149","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 6

Abstract

A variety of combinations of fingerstock materials both before and after exposure to an accelerated atmospheric corrosion environment was tested. The following materials/finishes were tested during this study: 304 stainless steel, passivated, MIL STD QQ-P-35B; 1010 steel, electroplated bright tin, 0.0003 in. nominal coating thickness, ASTM B545; 1010 steel, electroplated nickel 0.0005 in. nominal coating thickness, ASTMB689; 1010 steel, electroless nickel, 0.0005 in. coating thickness; 1010 steel, zinc-plated, 0.0005 in. plating thickness with yellow chromate conversion coating; 1010 steel, zinc-plated, 0.0002 in. minimum zinc thickness, with blue-bright chromate conversion coating; electrogalvanized steel, 0.0007 in. zinc thickness, with yellow chromate conversion coating; steel with hot-dipped aluminum-zinc (55:45) coating, 0.0008 in. coating thickness; 5052 aluminum, with yellow chromate conversion coating; and 5052 aluminum, with clear chromate conversion coating, ASTM B449, class 3. Metal panels were mated with beryllium copper fingerstock to make the joints typical of computer enclosure doors and panels. The finishes on the beryllium copper were: electroplated bright tin; electroplated bright nickel; electroplated tin-lead (60:40); and bright dip (a thin chromated conversion coating). The transfer impedance of the joint was used to measure the electrical performance and then the corrosion resistance of the conductive finishes.<>

查看原文本刊更多论文

腐蚀对电磁干扰屏蔽用导电涂层电性能的影响

测试了手指托材料在暴露于加速大气腐蚀环境之前和之后的各种组合。在本研究中测试了以下材料/饰面:304不锈钢，钝化，MIL STD QQ-P-35B;1010钢，电镀光亮锡，0.0003 in。ASTM B545标称涂层厚度;1010钢，电镀镍0.0005 in。ASTMB689标称涂层厚度;1010钢，化学镀镍，0.0005英寸。涂层厚度;1010钢，镀锌，0.0005英寸。镀厚用黄铬酸盐转化镀层;1010钢，镀锌，0.0002英寸。最小的锌层厚度，具有蓝色光亮的铬酸盐转化涂层;电镀锌钢，0.0007英寸。锌厚，用黄铬酸盐转化涂层;热浸铝锌(55:45)涂层钢，0.0008英寸。涂层厚度;5052铝，用黄色铬酸盐转化涂层;5052铝，透明铬酸盐转换涂层，ASTM B449, 3级。金属面板与铍铜指托配合使用，使其成为计算机外壳门和面板的典型接头。铍铜的表面处理是:电镀光亮锡;电镀光亮镍;电镀锡铅(60:40);和光亮浸渍(一种薄的铬化转换涂层)。用接头的传递阻抗来测量导电涂层的电性能和耐腐蚀性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

National Symposium on Electromagnetic Compatibility

自引率

0.00%

发文量