Corrosion Protection of Electrically Conductive Surfaces

The basic function of the electrically conductive surface of electrical contacts is electrical conduction. The electrical conductivity of contact materials can be largely reduced by corrosion and in order to avoid corrosion, protective coatings must be used. Another phenomenon that leads to increasi...

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Bibliographic Details
Published in:Metals (Basel ) 2012-11, Vol.2 (4), p.450-477
Main Authors: Song, Jian, Wang, Liangliang, Zibart, Andre, Koch, Christian
Format: Article
Language:English
Subjects:
Aluminum
Chlorine
Contact resistance
Copper
corrosion
Corrosion mechanisms
Corrosion prevention
Corrosion resistance
Corrosion tests
Electric contacts
Electrical conduction
electrical contacts
Electrical resistance
Electrical resistivity
Electrodes
Fog
Fretting
Fretting corrosion
Galvanic corrosion
Gold
Gold alloys
Gold plating
Hydrogen sulfide
Metals
nanoparticles
Nickel
Nitrogen dioxide
Palladium
passivation
Performance enhancement
Plating
plating materials
Protective coatings
Silver
Sulfur
Tin
wear
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Summary:The basic function of the electrically conductive surface of electrical contacts is electrical conduction. The electrical conductivity of contact materials can be largely reduced by corrosion and in order to avoid corrosion, protective coatings must be used. Another phenomenon that leads to increasing contact resistance is fretting corrosion. Fretting corrosion is the degradation mechanism of surface material, which causes increasing contact resistance. Fretting corrosion occurs when there is a relative movement between electrical contacts with surfaces of ignoble metal. Avoiding fretting corrosion is therefore extremely challenging in electronic devices with pluggable electrical connections. Gold is one of the most commonly used noble plating materials for high performance electrical contacts because of its high corrosion resistance and its good and stable electrical behavior. The authors have investigated different ways to minimize the consumption of gold for electrical contacts and to improve the performance of gold plating. Other plating materials often used for corrosion protection of electrically conductive surfaces are tin, nickel, silver and palladium. This paper will deal with properties and new research results of different plating materials in addition to other means used for corrosion protection of electrically conductive surfaces and the testing of corrosion resistance of electrically conductive surfaces.
ISSN:2075-4701
2075-4701
DOI:10.3390/met2040450