Lubricants for Separable Connectors

IEEE Transactions on Parts, Hybrids, and Packaging Pub Date : 1977-03-01 DOI:10.1109/TPHP.1977.1135172

W. Freitag

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引用次数: 24

Abstract

About two dozen lubricating fluids were tested for use on electrical contacts on card edge or pin-and-socket connectors. The lubricants selected for screening represented a cross section of thewide variety of natural and synthetic materials available on the market. Among them were polyphenyl ethers, natural and synthetic hydrocarbons, several types of esters, polygiycols, some fluorinated materials, a few silicones, and some proprietary formulations. Lubricants were evaluated on the basis of volatility and their ability to prevent fretting corrosion on tin-to-solder contacts. Limited tests were also done on their spreading characteristics, their thermal degradation properties, and their effect on contact resistance. The objective of the work was to develop guidelines in the selection of contact lubricants for field testing. The lubricants were ranked on the basis of weight loss from thin deposits of the samples on solder foil coupons at 65°C. Fretting experiments were done by forcibly moving a printed circuit card finger between a pair of spring contacts cut from actual cards and connectors. The time required for contact resistance to increase from a few milliohms to 2 \Omeg was determined as a function of the amount of lubricant present.

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可分离连接器用润滑剂

测试了大约24种润滑液用于卡边或插销连接器的电触点。筛选的润滑油代表了市场上各种各样的天然和合成材料的横截面。其中包括聚苯醚、天然和合成碳氢化合物、几种酯类、聚乙二醇、一些氟化材料、一些有机硅和一些专有配方。根据润滑油的挥发性和防止锡焊料接触处微动腐蚀的能力对其进行了评估。还对其扩散特性、热降解特性以及对接触电阻的影响进行了有限的试验。这项工作的目的是为现场试验制定选择接触润滑剂的准则。根据样品在65°C时薄沉积在锡箔片上的重量损失对润滑剂进行了排名。微动实验是通过在从实际卡和连接器上切下来的一对弹簧触点之间强行移动印刷电路板手指来完成的。接触电阻从几毫欧姆增加到2欧米茄所需的时间被确定为存在的润滑剂量的函数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE Transactions on Parts, Hybrids, and Packaging

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