Journal
CORROSION SCIENCE
Volume 150, Issue -, Pages 246-257Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2019.02.008
Keywords
Atmospheric corrosion; Thin electrolyte layer; Print circuit board; Dewing monitoring; Electrochemical impedance
Funding
- National Natural Science Foundation of China [51371087, 51771079]
- Innovative Foundation of HUST [2017KFYXJJ164]
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A novel dewing sensor consisting of two interlacing (comb-like) copper electrodes was fabricated by photolithography to monitor the formation and evaporation process of thin electrolyte layer (TEL), as well as atmospheric corrosion of copper during wetting-drying and high-low temperature cyclic tests. Thanks to the ultra narrow space between the comb-like electrodes, the sensor can probe earlier dew condensation on Cu even at low relative humidity. Moreover, the thickness of TEL can be easily calculated based on high-frequency impedance during the drying process of TEL.
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