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Corrosion behaviour of gold surfaces protected with bonded perfluoro polyethers
Author(s) -
Alamarguy D.,
Bertoglio M.,
Lécaudé N.,
Noël S.,
Ruaut L.,
Tristani L.
Publication year - 2004
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.1763
Subject(s) - corrosion , lubricant , electroplating , materials science , x ray photoelectron spectroscopy , layer (electronics) , adhesive wear , composite material , contact angle , metallurgy , chemical engineering , tribology , engineering
Perfluoro polyethers (PFPE) are known to offer some protection against the corrosion occurring on electroplated gold surfaces used in electrical contact applications. In this field, reliability requirements and severity of the environment of use are permanently increasing. We describe here the results of corrosion tests performed on electroplated gold coupons protected with layers of various PFPE. XPS measurements show that functionalized PFPE can be grafted to the surface. Attempts to bond the PFPE layer to the surface were also performed by exposure to UV light. Lubricant layers are shown to have better properties of protection against corrosion when they are bonded to the surface. Correlation with the mechanical and electrical performances required from such layers is also discussed. Copyright © 2004 John Wiley & Sons, Ltd.