开路传感器线圈变色

S. Suess
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引用次数: 0

摘要

一个电子传感器线圈未能通过连续性测试,表明在聚合物涂层的电线中存在断裂。电线的一个区域显示出绿色变色,电线的断裂位于同一区域。这种变色被怀疑是导致故障的原因之一。SEM/EDS和FTIR结果表明,线圈的断裂与腐蚀有关。腐蚀碎片中含有相对较高水平的钠和氯,它们很可能以盐的形式存在。沿电线表面的其他区域也发现了一些盐沉积。调查结果表明,盐或盐水泄漏到传感器中,导致电线局部腐蚀,可能是在涂层中已经存在损坏的区域。当减小截面处的电流密度引起过度的局部加热,导致线材熔化时,线材发生分离。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Discoloration of Open-Circuit Sensor Coil
An electronic sensor coil failed continuity testing, indicating that a break was present in the polymer-coated wire. An area of the wire showed a green discoloration and the break in the wire was located in this same region. The discoloration was suspected to be an indicator of what caused the failure. SEM/EDS and FTIR results showed the break in the coil wire was associated with corrosion. The corrosion debris contained relatively high levels of sodium and chlorine, which were likely in the form of salt. Some salt deposits were noted also in other areas along the wire surface. The findings suggested salt or salt water had leaked into the sensor and caused localized corrosion to the wire, possibly at an area where preexisting damage was present in the coating. Separation occurred in the wire when the current density at the reduced cross section caused excessive localized heating, which led to melting of the wire.
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