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Failure Analysis of a Nickel-Plated Electronic Connector Due to Salt-Induced Corrosion (ENGE 2014)

Title
Failure Analysis of a Nickel-Plated Electronic Connector Due to Salt-Induced Corrosion (ENGE 2014)
Author
최덕균
Keywords
Energy Efficiency; Corrosion; Nickel; Reliability; Delamination
Issue Date
2015-10
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v. 15, Page. 7498-7502
Abstract
When electronic connectors in mobile devices are miniaturized, the thickness of plating decreases. However, this thin plating is expected to decrease the life of the connector due to problems with corrosion. In this study, salt spray aging tests were performed on miniaturized nickel-plated stainless steel electronic connectors to observe failure mechanisms in realistic environments. The tests were performed three times using a 5% NaCl solution in an atmosphere of 45 degrees C; each test included several cycles where one cycle was one 24-h period consisting of 8 h of salt spray and 16 h without salt spray. The nickel-plating layers were periodically observed by electron probe X-ray micro-analyzer, wavelength dispersive spectroscopy, and field-emission scanning electron microscopy to analyze and identify the corrosion mechanism. We found that the primary failure mode of the nickel plating is blistering and delannination. The corrosion mechanism is typically a chain reaction of several corrosion mechanisms: pitting corrosion -> stress corrosion cracking -> hydrogen-induced cracking -> blistering and delamination. Finally, we discuss countermeasures to prevent corrosion of the nickel layer based on the corrosion mechanisms identified in this study.
URI
http://www.ingentaconnect.com/content/asp/jnn/2015/00000015/00000010/art00014http://hdl.handle.net/20.500.11754/28312
ISSN
1533-4880; 1533-4899
DOI
10.1166/jnn.2015.11157
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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