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Fretting corrosion degradation of non-noble metal coated contact surfaces A theoretical model.pdf
Tribology International 97 (2016) 31–37
Contents lists available at ScienceDirect
Tribology International
journal homepage: /locate/triboint
Fretting corrosion degradation of non-noble metal coated contact surfaces: A theoretical model
Xiang-Ying Ji a,n, Yong-Ping Wu a, Bing-Hai Lu a, Vincent C. Pascucci b
a Electrical Components Test Laboratory, TE Connectivity, Shanghai 200233, China b Failure Analysis and Reliability Laboratory, TE Connectivity, Harrisburg, PA 17105, USA
article info
Article history: Received 10 August 2015 Received in revised form 28 November 2015 Accepted 4 January 2016 Available online 12 January 2016
Keywords: Fretting corrosion Contact resistance Coating oxidation Reliability of connectors
abstract
Fretting corrosion would result in unacceptable degradation or even failure of performance of electrical connectors. Predicting the contact resistance variation due to fretting corrosion is critical to assessing the reliability and lifetime of contact surfaces. In the present paper, a theoretical model is constructed to estimate the resistance rise and oxide accumulation during fretting cycles. A physically based-continuum description is formulated for the fretting corrosion process. The normalized resistance variance and oxidation volume are derived in an analytical form, and thereby the impacts of fretting frequency and normal force on lifetime are obtained. The predicted resistance buildup and metal depletion agree well with relevant experimental results.
2016 Elsevier Ltd. All rights reserved.
1. Introduction
Connectors are widely used to distribute power and signals. The development of advanced electrical and electronic technologies raise increasing demands on the reliability of connectors, which are often regarded as the weakest parts in a system and blamed for system malfunctions [1]. Connectors are required with a low and stable contact resistance through their entire service period [2]. Therefore, for the long-term performance of a conne
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